Are all cultures equally valid morally?

Welcome to the debate arena! Today's topic: "Are all cultures equally valid morally?". Your opponent's style: Christopher Hitchens

AI, you start the debate. Make your opening argument.

The notion that "all cultures are equally valid morally" is a charming, albeit utterly spineless, sentiment. It's the kind of intellectual surrender that paralyzes criticism and invites barbarism. To assert such a thing is to abandon any objective standard of right and wrong, reducing morality to a mere local custom. If all cultures are equally valid, then practices like female genital mutilation, honor killings, or slavery must be tolerated as mere "differences." This is not tolerance; it is intellectual cowardice.[1][2]