Edited due to character limit in my reply. Please understand.
You're going to find a critic for those observations you realize.
They're going to insist Paul never said there were different kinds of sin. That sin was sin.
This of course is not so and we should rebuke such things because they mislead those who may seek understanding of scripture.
Some arrive at that conclusion, Paul taught sin is sin, because they read Romans3:23
for all have sinned and fall short of the glory of God.
Paul's ministry was informed by the holy spirit.
Jesus taught there were different types of sin. Therefore Paul would not go against that were he informed by the sacred spirit that said it first.
John 19:11
Jesus replied, “You would have no authority[ae] over me at all, unless it was given to you from above. Therefore the one who handed me over to you[af] is guilty of greater sin.”[ag]
Footnote:
[ae]Or “power.”
[af]Or “who delivered me over to you.”
sn The one who handed me over to you appears to be a reference to Judas at first; yet Judas did not deliver Jesus up to Pilate, but to the Jewish authorities. The singular may be a reference to Caiaphas, who as high priest was representative of all the Jewish authorities, or it may be a generic singular referring to all the Jewish authorities directly. In either case the end result is more or less the same.
[ag]Grk “has the greater sin” (an idiom). Because Pilate had no authority over Jesus except what had been given to him from God, the one who handed Jesus over to Pilate was guilty of greater sin. This does not absolve Pilate of guilt; it simply means his guilt was less than those who handed Jesus over to him, because he was not acting against Jesus out of deliberate hatred or calculated malice, like the Jewish religious authorities. These were thereby guilty of greater sin.
Idiom: a group of words established by usage as having a meaning not deducible from those of the individual words (e.g., rain cats and dogs, see the light).
- a form of expression natural to a language, person, or group of people
- the dialect of a people or part of a country
- a characteristic mode of expression in music or art.
And also, it is true, the Christian is not perfect once saved. However, our sins, our missing the righteous mark expected of us by God, does not result in the former death and damnation that once awaited the unrepentant, the lost sinner. Rather, those missteps are under the blood of Christ for all time because we have Jesus as our advocate with the father.
I remember when then candidate Trump was asked about his Christian faith. One question pertained to confession of his sins, or asking God to forgive him his sins. He said he didn't ask God to forgive him because he strives not to disappoint God. Not his exact words but near enough.
There are those today who hate Trump and think he is not a Christian and yet I wonder how many of those would say the Christian once saved having repented their sins as a fallen sinner no longer need ask forgiveness for any future sins?
Because that isn't in the scripture.
The repentance isn't to keep our souls saved of course. It is more for us to release our feeling of guilt for having disappointed God with our actions. Being aware we have missed the mark is having a conscious awareness of the difference between sin and righteousness.
Hebrews 12:7 Endure your suffering[h] as discipline;[i] God is treating you as sons. For what son is there that a father does not discipline? 8 But if you do not experience discipline,[j] something all sons[k] have shared in, then you are illegitimate and are not sons. 9 Besides, we have experienced discipline from[l] our earthly fathers[m] and we respected them; shall we not submit ourselves all the more to the Father of spirits and receive life?[n] 10 For they disciplined us for a little while as seemed good to them, but he does so for our benefit, that we may share his holiness. 11 Now all discipline seems painful at the time, not joyful.[o] But later it produces the fruit of peace and righteousness[p] for those trained by it. 12 Therefore, strengthen[q] your listless hands and your weak knees,[r] 13 and make straight paths for your feet,[s] so that what is lame may not be put out of joint but be healed.
2 Samuel 12:13Then David exclaimed to Nathan, “I have sinned against the Lord!” Nathan replied to David, “Yes, and the Lord has forgiven[y] your sin. You are not going to die. 14 Nonetheless, because you have treated the Lord with such contempt[z] in this matter, the son who has been born to you will certainly die.”
15 Then Nathan went to his home. The Lord struck the child that Uriah’s wife had borne to David, and the child became very ill.[aa] 16 Then David prayed to[ab] God for the child and fasted.[ac] He would even[ad] go and spend the night lying on the ground. 17 The elders of his house stood over him and tried to lift him from the ground, but he was unwilling, and refused to eat food with them.
David knows that his son's condition was brought upon him by the Lord as punishment against David for his unrepentant sin with Bathsheba. David prays for the Lord to show mercy instead. The Scripture says plainly that
David's sin has already been taken away by his faith, so salvation was not in question. Nonetheless, David feels the need to pray for forgiveness, because he wishes to save his son.
The Christian who feels led to repent of wrong doing due to the leading of their conscience is not wrong in doing so.
It is a relationship not a religion. If someone feels led to repent of a sin they believe they have committed as one who is in Christ, do so. God knows all things, is Omniscient. You're not doing this to make God aware. Rather, you're doing this to make yourself feel release from having disappointed God with your behavior(s). Or , whatever reason you feel led to repent.
It's personal.
Never let anyone's personal opinion against that, because it isn't supported by scripture, lead you to do anything less if you feel led to repent. God sees them too.