For STEM, or computer programming and math at least, it's far harder to know. Certainly there are very few black people in tech/math, at least at the higher levels.
Perhaps part of the problem is that empty virtue signaling (like banning the terms "master" and "slave") is easy, but actually doing the work that would really matter is hard. I spent a couple hours helping a black kid polish up for his Google interview (he made it).
That's something, but it will really take serious tutoring and a society wide scale to bridge the gap. And other socioeconomic factors might still prove overwhelming.
And for gods' sake, the whole "girls that code" thing needs to die right now. Can you imagine how a young black man would be affected by that?
so then by that logic, you can argue why there are so few whites in basketball must be that they aren't as tall and muscular.