[jmchuster]

Maybe they just choose other groups to associate and tribalize with instead of the ethnic one, like say, the startup community.

If you don't grow up in an asian community or have a lot of asians at your work place, you wouldn't even have an opportunity to form a community, let alone start thinking that you need to prioritize the needs of that community.

The mental calculus to shift to a community-first mindset might be analogous to forming/joining a union. You give up some of your own individual upside to get better benefits together as a group. You'll certainly better improve the "floor" of the group, but harder to tell if doing so ends up improving or lowering the "average" of the whole group.