aside from the rambam’s statements about astronomy and his son, rabbeinu avrohom’s seeming expansion of it to cover other areas of science, which rishonim question chazal’s conclusions at all? in drush, many do, like the radak and ibn ezra, but they give reasons for doing so. they aren’t saying chazal are wrong, but rather that they must express their 70 ponim latorah understanding which as a rishon, they are entitled to do. after which time, no one else engaged in such study, even in drush, but definitely not in chazal’s statements such as killing lice on shabbos, etc..
you’re parroting online talking points without giving a stitch of evidence, much like your theories on orthopraxy. they’re just hollow. achronim across the board enshrine every word of chazal as torah misinai; check out the beer hagolah from the maharal, gr”a, and tons of others.