I mostly agree with what you said here.
That's why I concluded that the one or two book difference would not affect the texts overall, just as copying errors do not affect the overall message.
I personally believe God has a hand in his works, and the lives of his people, so if the writings in the Bible come from writings originally inspired by him, then he will make sure he preserves his word, whether he has to use his power to move people to act to defend it, or uphold it.
He has done this throughout history, so I believe that's why certain books were removed, certain people played a role in developing the canon, copying and translating, etc.
Even if one or two errors slips in, as long as God sees them as no serious threat, he may well decide to leave them, because
1) they can serve as a means of determining those who genuinely and humbly search for truth - and he can definitely use his spirit to help them, and
2) God allows corruption to take its course, without intervening, but at the same time acting accordingly to maneuver each situation, to the end that his will be done.
I'm confident that despite man's attempts to corrupt and destroy the true writings, God has done his part in making certain they did not succeed.
Hence, when the Dead Sea Scrolls were found, they testified to this fact. Differences in the Septuagint were not critical to the texts. So I think we can be confident that the same applies to the originals
All these evidences, as well as the ones I mentioned in
Post #2, and
other posts, is enough to verify the authenticity of the scriptures.
Attacks against it will not cease until, Revelation 16:14-16 is fulfilled.