Mating is good. I am somewhat baffled as to why the "PUA" discussion has had a strong negative connotation. As you say, there's a ton of benefits for everyone involved, and it serves as a successful, easy-to-test model for many related skill sets. Personally I think the hesitancy to talk about mating and mating development is likely no more than a sort of vestigial organ of society's ancient associations with religion. It still seems "improper" in ordinary society to talk about how to get into someone's pants. But I see no reason why the sort of thing like "pick-up-artistry" must be unethical or wrong.