I mean, basic statistics: in a group of 20 white men and 1 black woman, all else being equal, the black woman is likely to have radically different experiences.
> How do you know that?
I think this because I routinely run into examples in the vein of "this cool facial recognition tech doesn't recognize black people".
There's obviously some very low-hanging fruit in terms of having even one voice who will look at the situation and notice stuff like that.
All that said: Obviously a white person can notice that, and a black person can miss it. It's just statistics. And a white person can still be diverse along a dozen other axes! If you want to sell your product to conservatives, you probably want at least one conservative on your team for the same reason!