The amount of copies says nothing about the truth of the text. You provided only evidence that the copies are consistent with each other, not that they are true.
Compare the gospels to Julius Ceasar's Crossing of the Rubicon:
First of all, we have Caesar's own word on the subject. Indeed, The Civil War has been a Latin classic for two thousand years, written by Caesar himself and by one of his generals and closest of friends. In contrast, we do not have anything written by Jesus, and we do not know for certain the name of any author of any of the accounts of his earthly resurrection.
Second, we have many of Caesar's enemies, including Cicero, a contemporary of the event, reporting the crossing of the Rubicon, whereas we have no hostile or even neutral records of the resurrection until over a hundred years after the event, which is fifty years after the Christians' own claims had been widely spread around.
Third, we have a number of inscriptions and coins produced soon after the Republican Civil War related to the Rubicon crossing, including mentions of battles and conscriptions and judgments, which provide evidence for Caesar's march. On the other hand, we have absolutely no physical evidence of any kind in the case of the resurrection.
Fourth, we have the story of the "Rubicon Crossing" in almost every historian of the period, including the most prominent scholars of the age: Suetonius, Appian, Cassius Dio, Plutarch. Moreover, these scholars have a measure of proven reliability, since a great many of their reports on other matters have been confirmed in material evidence and in other sources. In addition, they often quote and name many different sources, showing a wide reading of the witnesses and documents, and they show a desire to critically examine claims for which there is any dispute. If that wasn't enough, all of them cite or quote sources written by witnesses, hostile and friendly, of the Rubicon crossing and its repercussions.
Compare this with the resurrection: we have not even a single established historian mentioning the event until the 3rd and 4th centuries, and then only by Christian historians. And of those few others who do mention it within a century of the event, none of them show any wide reading, never cite any other sources, show no sign of a skilled or critical examination of conflicting claims, have no other literature or scholarship to their credit that we can test for their skill and accuracy, are completely unknown, and have an overtly declared bias towards persuasion and conversion.
Fifth, the history of Rome could not have proceeded as it did had Caesar not physically moved an army into Italy. Even if Caesar could have somehow cultivated the mere belief that he had done this, he could not have captured Rome or conscripted Italian men against Pompey's forces in Greece. On the other hand, all that is needed to explain the rise of Christianity is a belief--a belief that the resurrection happened. There is nothing that an actual resurrection would have caused that could not have been caused by a mere belief in that resurrection. Thus, an actual resurrection is not necessary to explain all subsequent history, unlike Caesar's crossing of the Rubicon.
It should be clear that we have many reasons to believe that Caesar crossed the Rubicon, all of which are lacking in the case of the resurrection. In fact, when we compare all five points, we see that in four of the five proofs of an event's historicity, the resurrection has no evidence at all, and in the one proof that it does have, it has not the best, but the very worst kind of evidence--a handful of biased, uncritical, unscholarly, unknown, second-hand witnesses. Indeed, you really have to look hard to find another event that is in a worse condition than this as far as evidence goes. So Geivett is guilty of a rather extreme exaggeration. This is not a historically well-attested event, and it does not meet the highest standards of evidence.
But reasons to be skeptical do not stop there. We must consider the setting--the place and time in which these stories spread. This was an age of fables and wonder. Magic and miracles and ghosts were everywhere, and almost never doubted. I'll give one example that illustrates this: we have several accounts of what the common people thought about lunar eclipses. They apparently had no doubt that this horrible event was the result of witches calling the moon down with diabolical spells. So when an eclipse occurred, everyone would frantically start banging pots and blowing brass horns furiously, to confuse the witches' spells. So tremendous was this din that many better-educated authors complain of how the racket filled entire cities and countrysides. This was a superstitious people.
Only a small class of elite well-educated men adopted more skeptical points of view, and because they belonged to the upper class, both them and their arrogant skepticism were scorned by the common people, rather than respected. Plutarch laments how doctors were willing to attend to the sick among the poor for little or no fee, but they were usually sent away, in preference for the local wizard. By modern standards, almost no one had any sort of education at all, and there were no mass media disseminating scientific facts in any form. By the estimates of William Harris, author of Ancient Literacy [1989], only 20% of the population could read anything at all, fewer than 10% could read well, and far fewer still had any access to books. He found that in comparative terms, even a single page of blank papyrus cost the equivalent of thirty dollars--ink, and the labor to hand copy every word, cost many times more. We find that books could run to the tens or even hundreds of thousands of dollars each. Consequently, only the rich had books, and only elite scholars had access to libraries, of which there were few. The result was that the masses had no understanding of science or critical thought. They were neither equipped nor skilled, nor even interested, in challenging an inspiring story, especially a story like that of the Gospels: utopian, wonderful, critical of upper class society--even more a story that, if believed, secured eternal life. Who wouldn't have bought a ticket to that lottery? Opposition arose mainly from prior commitments to other dogmas, not reason or evidence.
The differences between society then and now cannot be stressed enough. There didn't exist such things as coroners, reporters, cameras, newspapers, forensic science, or even police detectives. All the technology, all the people we have pursuing the truth of various claims now, did not exist then. In those days, few would even be able to check the details of a story if they wanted to--and few wanted to. Instead, people based their judgment on the display of sincerity by the storyteller, by his ability to impress them with a show or simply to persuade and "sell" his story, and by the potential rewards his story had to offer. At the same time, doubters didn't care to waste the time or money debunking yet another crazy cult, of which there were hundreds then. And so it should not surprise us that we have no writings by anyone hostile to Christianity until a century after it began--not even slanders or lies. Clearly, no doubter cared to check or even challenge the story in print until it was too late to investigate the facts.
Compare the gospels to Julius Ceasar's Crossing of the Rubicon:
First of all, we have Caesar's own word on the subject. Indeed, The Civil War has been a Latin classic for two thousand years, written by Caesar himself and by one of his generals and closest of friends. In contrast, we do not have anything written by Jesus, and we do not know for certain the name of any author of any of the accounts of his earthly resurrection.
Second, we have many of Caesar's enemies, including Cicero, a contemporary of the event, reporting the crossing of the Rubicon, whereas we have no hostile or even neutral records of the resurrection until over a hundred years after the event, which is fifty years after the Christians' own claims had been widely spread around.
Third, we have a number of inscriptions and coins produced soon after the Republican Civil War related to the Rubicon crossing, including mentions of battles and conscriptions and judgments, which provide evidence for Caesar's march. On the other hand, we have absolutely no physical evidence of any kind in the case of the resurrection.
Fourth, we have the story of the "Rubicon Crossing" in almost every historian of the period, including the most prominent scholars of the age: Suetonius, Appian, Cassius Dio, Plutarch. Moreover, these scholars have a measure of proven reliability, since a great many of their reports on other matters have been confirmed in material evidence and in other sources. In addition, they often quote and name many different sources, showing a wide reading of the witnesses and documents, and they show a desire to critically examine claims for which there is any dispute. If that wasn't enough, all of them cite or quote sources written by witnesses, hostile and friendly, of the Rubicon crossing and its repercussions.
Compare this with the resurrection: we have not even a single established historian mentioning the event until the 3rd and 4th centuries, and then only by Christian historians. And of those few others who do mention it within a century of the event, none of them show any wide reading, never cite any other sources, show no sign of a skilled or critical examination of conflicting claims, have no other literature or scholarship to their credit that we can test for their skill and accuracy, are completely unknown, and have an overtly declared bias towards persuasion and conversion.
Fifth, the history of Rome could not have proceeded as it did had Caesar not physically moved an army into Italy. Even if Caesar could have somehow cultivated the mere belief that he had done this, he could not have captured Rome or conscripted Italian men against Pompey's forces in Greece. On the other hand, all that is needed to explain the rise of Christianity is a belief--a belief that the resurrection happened. There is nothing that an actual resurrection would have caused that could not have been caused by a mere belief in that resurrection. Thus, an actual resurrection is not necessary to explain all subsequent history, unlike Caesar's crossing of the Rubicon.
It should be clear that we have many reasons to believe that Caesar crossed the Rubicon, all of which are lacking in the case of the resurrection. In fact, when we compare all five points, we see that in four of the five proofs of an event's historicity, the resurrection has no evidence at all, and in the one proof that it does have, it has not the best, but the very worst kind of evidence--a handful of biased, uncritical, unscholarly, unknown, second-hand witnesses. Indeed, you really have to look hard to find another event that is in a worse condition than this as far as evidence goes. So Geivett is guilty of a rather extreme exaggeration. This is not a historically well-attested event, and it does not meet the highest standards of evidence.
But reasons to be skeptical do not stop there. We must consider the setting--the place and time in which these stories spread. This was an age of fables and wonder. Magic and miracles and ghosts were everywhere, and almost never doubted. I'll give one example that illustrates this: we have several accounts of what the common people thought about lunar eclipses. They apparently had no doubt that this horrible event was the result of witches calling the moon down with diabolical spells. So when an eclipse occurred, everyone would frantically start banging pots and blowing brass horns furiously, to confuse the witches' spells. So tremendous was this din that many better-educated authors complain of how the racket filled entire cities and countrysides. This was a superstitious people.
Only a small class of elite well-educated men adopted more skeptical points of view, and because they belonged to the upper class, both them and their arrogant skepticism were scorned by the common people, rather than respected. Plutarch laments how doctors were willing to attend to the sick among the poor for little or no fee, but they were usually sent away, in preference for the local wizard. By modern standards, almost no one had any sort of education at all, and there were no mass media disseminating scientific facts in any form. By the estimates of William Harris, author of Ancient Literacy [1989], only 20% of the population could read anything at all, fewer than 10% could read well, and far fewer still had any access to books. He found that in comparative terms, even a single page of blank papyrus cost the equivalent of thirty dollars--ink, and the labor to hand copy every word, cost many times more. We find that books could run to the tens or even hundreds of thousands of dollars each. Consequently, only the rich had books, and only elite scholars had access to libraries, of which there were few. The result was that the masses had no understanding of science or critical thought. They were neither equipped nor skilled, nor even interested, in challenging an inspiring story, especially a story like that of the Gospels: utopian, wonderful, critical of upper class society--even more a story that, if believed, secured eternal life. Who wouldn't have bought a ticket to that lottery? Opposition arose mainly from prior commitments to other dogmas, not reason or evidence.
The differences between society then and now cannot be stressed enough. There didn't exist such things as coroners, reporters, cameras, newspapers, forensic science, or even police detectives. All the technology, all the people we have pursuing the truth of various claims now, did not exist then. In those days, few would even be able to check the details of a story if they wanted to--and few wanted to. Instead, people based their judgment on the display of sincerity by the storyteller, by his ability to impress them with a show or simply to persuade and "sell" his story, and by the potential rewards his story had to offer. At the same time, doubters didn't care to waste the time or money debunking yet another crazy cult, of which there were hundreds then. And so it should not surprise us that we have no writings by anyone hostile to Christianity until a century after it began--not even slanders or lies. Clearly, no doubter cared to check or even challenge the story in print until it was too late to investigate the facts.
https://infidels.org/library/modern/richard_carrier/resurrection/lecture.html