You are under the false impression that all translations basically say the same thing when nothing could be further from the truth. As I have done before with others, I will redirect you to a list of changed doctrines found in Modern Translations.
If you go back to my post
here, you will see 25 changes in Modern Bibles by way of comparison to the King James Bible.
These changes are for the worse and not for the better. These are glaring problems that change doctrine and is big thing to swallow (i.e., which would be like swallowing a camel). We are not talking about what may look like a minor supposed errors in the KJV (straining at gnats), or a word being archaic in the King James Bible. There are serious problems in the Modern Bibles and thus it disqualifies them as being the true Word of God. God does not make mistakes. His promise in preserving His words perfectly is true (Psalms 12:6-7).