Simple observation of difference is thus not a genetic argument. Both conclusions are based on the same standard of evidence. In either case, we are faced with the scientifically impossible task of drawing conclusions from a mass of poorly controlled data. Lots of things go into the observation of excellence or failure, only one of which is genetic endowment. But obviously humans differ.
All populations are heterogeneous and are built in some sense in opposition to other groups.
It's broad enough to encompass Arthur Ashe, Mike Tyson and Kobe Bryant. Whatever physical gift these men share is not immediately apparent from looking at them. Black men of highly diverse builds enter athletics and excel. Far more don't excel. In other words, there is a lot more to being black and to being a prominent athlete than mere biology.