SJS:
I don’t think anyone, including the most RW and Chazal themselves, would claim they are “infallible”. It would be Apikorsus on their part. We have gone though this here (in the CR) before as well.
From what you are saying, you agree we can treat as “halachicly true” (love that term) what Chazal said, even if it has emperically proven to be false. For example the famous “lice” case, where we “know” the opposite of what Chazal said (lice grow from nothing): We either re-interpet Chazal to conform with known facts, or are Machmir as such (since it is well known Chazal did speak in allegory) while considering the other side as well.
(regarding Emunah) There is nothing wrong with having questions without answers. The choice is to believe that there are ultimate answers to the questions, even if our minds can not begin to fathom them (as Mr. 80 pointed out). I believe that is what SJS is saying. If DHM has all of the answers, he is not only ahead of me, but Shlomo Hamelech, Moshe Rabbanu, and others (which is why I’m sure that is not what he means either).