I thought the most interesting point was in the comments - that rural and suburban kids are more easily able to develop their potential now because AAU lets them play against a higher level of competition, and social media lets them watch other players and learn from them. A generation ago those factors were tilted toward inner-city players; now it's much more even. The cultural argument didn't really do anything for me, but I'm far outside those circles so it'd be hard for me to refute it.
BTW don't read the comments, it turns into a stupid political wankfest over a throwaway line the author made about Reaganomics.
I know. What did he want? Carternomics?