ujm,
“Infallibility is a straw man and red herring. No one claims it.”
Agreed. Once when I was in middle school, I found a mistake in the answer key that was in the back of my math textbook. I pointed it out to the teacher, who praised me for finding it. That experience was actually detrimental to my learning, because other times came up when my answer differed from the back of the book, and I would argue the correctness of my answer and be wrong. Because while the textbook was obviously not infallible, it made far fewer mistakes than I did. It’s the same thing with the Avos, or the Tannaim, or gedolim. They’re not infallible; they made or make mistakes. But their level is so much greater than mine, that it is exceedingly more likely that I am mistaken or do not understand than it is that they are.