I've never thought that cultural relativism is supposed to be bad/wrong - I thought that kinds of thinking is superstitious, a bit racist, and are an undesirable strong basis for many kinds of hostilities in the world that it shouldn't be a formal majority point of view.
One cannot realistically construct the ethics procedurally and reproducibly from blank slate, so holding a false beliefs that one can or do have such set of "scientific" ethical standards only justify genociding oppositions.
Ethics is just half-broken loose set of heuristics developed and optimized evolutionarily. It probably can't even be properly quantized into text. It's nothing that stands up to scientific computational scrutiny. And there we step into cultural relativism as a principle; there are lots of behaviors we humans show as "ethical" acts that sometimes seem random and not universal, that also seem to work where it is done, and maybe not work where it is not done, so you can't say which one is it.
One cannot realistically construct the ethics procedurally and reproducibly from blank slate, so holding a false beliefs that one can or do have such set of "scientific" ethical standards only justify genociding oppositions.
Ethics is just half-broken loose set of heuristics developed and optimized evolutionarily. It probably can't even be properly quantized into text. It's nothing that stands up to scientific computational scrutiny. And there we step into cultural relativism as a principle; there are lots of behaviors we humans show as "ethical" acts that sometimes seem random and not universal, that also seem to work where it is done, and maybe not work where it is not done, so you can't say which one is it.