No, it means he's saying that all the examples I gave are of people who aren't actually any good at what they do and are interesting only because for a black person to be able to attempt those tasks at all is remarkable.
In all fairness, this describes a lot of lists of "achievements of minority X in field Y". To some extent, it's a natural result of looking for "achievements" from a tiny minority (e.g. Turks or whatever) in a field where they don't really have a comparative advantage.
AIUI, Eugine The Fourth is trying to suggest that there's something more than this going on: that black people are underrepresented in lists of successful people not because there are few of them but because they're mentally inferior for some (presumably genetic) reason.
Black people are not a tiny minority globally, so to first order it would be evidence for that theory if in fact lists of successful black people look like lists of successful Turkish people.
Of course there are other factors; e.g., most of Africa is grindingly poor -- though I expect Eugine...
Another month, another rationality quotes thread. The rules are: