When you say "it's pretty simple: Humans are diverse" you are still making a pretty nebulous statement. What does diversity even mean there? On what basis are you resting your argument that evolution created human diversity, and is not in fact working against it? How do you compare genetic diversity to socioeconomic diversity in a way that is useful or sheds light on their actual relationship?

There is no question genetics play a role, the question is how big of a role do they play? You haven't gotten anywhere close to answering that.