But why can't this be true? Numerous studies have shown that genetic and particularly cultural traits produce vast differences in cognitive ability. Most recently for instance in a story about Korean twins separated at birth[1].
Research also shows that these differences can account for an overwhelming majority of the disparity in outcomes. This has been an active area of research for decades, and academia isn't at all in agreement that "marginalization" is the culprit here[2].
> marginalized groups have drastically worse outcomes
Not all "marginalized groups" do though, do they? Unless you only include groups with poor outcomes in your definition of "marginalized", in which case it's a bit circular isn't it?
1. https://www.psypost.org/2022/05/psychologists-found-a-striki...