some validity. If so, it truly is one more reason that "diversity and inclusion" (of cultures I might add) is often counterproductive and dysfunctional. If a black kid needs another black to convince them to study and stay in school then why not just go back to straight segregation and really help them out?
Also, here's a reason I'm a little skeptical, as a bit of a counter-argument.
https://www.bloomberg.com/news/articles/2017-04-06/lies-damn-lies-and-financial-statistics