I don't think you're being fair nsporillo (the GP commenter) asked what societal structures were [currently] a specific hindrance based on race. Noting that it appeared that the entire legal structure of society was the target.

In response someone posted about a load of laws, which it turns out are all historic.

They didn't say intergenerational wealth transfer (which is a poor-person issue not a race issue per se - though it has a non-representative racial profile for sure).

I'm not sure what you're suggesting with "network effects", presumably people in established positions of power can maintain a discriminatory hold on those allowed to join the group?