You put so much stock in your rational explanations that you don't realize how anachronistic your "rationality" is. Miracles weren't the invention of the Bible authors, there were other prophets, miracle workers, oracles (like the one at Delphi) and exorcists around. These things were a reality to these people. What made Jesus' miracles significant is that they fit a specific model, served a specific purpose, and displayed an undeniable authority - so much so that instead of questioning their validity, his detractors and sketics argued (for long after his death) that it was either borrowed from God (Toledoth Yeshu) or by the help of the devil (Matt. 12:24). Unlike us, they took it for granted miracles were possible. Even if they were mistaken about what they witnessed, they would still not be lying.
This says absolutely nothing for it being an actual event that Jesus rose from literal death and bodily ascended to heaven. Or that he was the actual son of God, or that he was born of a virgin mother, or that he walked on water. The list is endless, and these myths are simply embellishments that are typical of story telling of the time.
The remarkable thing is that it is easy for lazy minded people like yourself to be seduced by them to the point were every fantasy in the Bible has place in reality and historical event.
And how do you account for this belief? What makes it any more valid than someone who have "always thought" the Bible was verbally inspired from start to finish?
I don't know if you have ever actually read the Bible, but there are several explanations which are infinitely more likely than the Bible being infallable. Such as: Some of the Bible is based on actual events but is marred by embellishments throughout. Or that all/most of the Bible is fiction based on myths spread by preachers over many years.
Your only argument is that it somehow accurately extracts actual events from trustworthy sources and accordingly writes them down without bias, and doesn't let the growth of myth get in the way.
I think that then exposes you as having irrational wishful thinking - as based on the nature of the story told in the Bible, the above is impossible.