Non-chiral protein life (as we know it) simply cannot exist, as enzymes rely on precise molecular shaping to implement the catalytic pathways for chemical react

Non-chiral protein life (as we know it) simply cannot exist, as enzymes rely on precise molecular shaping to implement the catalytic pathways for chemical reactions essential to life. Without chiral selection, it would be impossible to build these precisely folded polypeptides with well-defined functional groups. So, for me, there is no question of “why chirality” — the entire chemical architecture of life depends on it. The question is, perhaps, “are there other options possible?”