If they are infallible, why don’t men ask their wives to wash their feet anymore? Or beat them when they don’t?
I’m with Wolf on Chazal.
Besides, their choice of clothing, food, lifestyle was all influenced by surrounding culture. A lot of their philosophy jives with thoughts that were prevalent during those times. And that was the reality at that time.
The problem with saying Chazal was infallible is if somethihng is shown to be incorrect, you either have to find a way around it (like lice) or risk admitting that Chazal was wrong. I prefer to assume Chazal were brilliant men who were much closer to truth that we are, but still not infallible.
Besides, there are many dissenting opinions in Chazal – does that mean they are ALL right?