Don't know what happened last quote but it got funky so I"ll just respond like this.
Here is the issue. There are several versions of the bible. Then there are several different religions out there other than the Christian religion. The bible has been in flux as to what is considered cannon over time and across different denominatinos. If the bible purely was inspired by god with no personal opinion of the men who physically wrote and compiled it then it means that the majority of which are fake. And that your specific version as it is currently written is the only divinely inspired version of this specific holy test which is only one of many found in the world who all claim to be divinley inspired by their god. Your version isn't even the most recent not is it the oldest.
Several versions: In good translations, there is no significant differences. Does it matter if one version has soil and another had dirt and another has earth? Many Hebrew words have more than one meaning. God scholars can tell which meaning is best by the context. Personal opinions can creep in in interpretations, but not in translations by qualified scholars. Most of the Bible is not that hard to understand when it is literal. Some passages are very difficult. This causes different interpretations. In conservative, Bible believing denominations, there, there is no serious differences in the basic doctrines.
The problems we get into with this is that even the manuscripts are translations. We have no original copies of any text. And even then how we know what is cannon for the bible has been subject to debate since the beginning. How do we know that your specific compiled list is the actual word of god? IT isn't that it has simply survived all this time because we have other version that have survived just as long.
Most of the debate, probably all of it, concerns if book A should be in the canon. If God did not inspire no only the whole Bible, but also the canon, religion is a waste of time. The books the Protestant rejected but are included in the Catholic canon are mostly history and do not affect doctrine. One of them mentions purgatory. Does purgatory exist? It really doesn't mater. Believing it does or believeing it does not will not keep anyone out of heaven.
And as far as not changing vs not taking away or adding then that still doesn't make sense because we have seen exactly that done to the bible for nearly 1800 years. The most recent additions and subtractions have come about even this decade.
Changing word that has been wrongly defined, is not adding to. The KJ has "Thou shall not kill.: That was never in good translation because good scholars know the word means "murder, and to their credit then NKJ has made that correction. What was a good translation for its time, is now a better, more accurate translation.