"A players are banished to spend the rest of their lives in specialized communities like Silicon Valley?"
This sounds to me more like "tribal overrating" bias (I invented this bias myself :) ). You just define that SV only has these "A players" (a purposely loose definition btw), so you go ahead and also imagine there are no A players outside these "specialized communities".
And I hate the way you formulated your question, opposing "average people" and "A players" so, so determinative, creating a "we" vs "them" situation.