Some form of at least partial superiority is inherent in the notion of "helping", as is a power dynamic.

You say that your colleague's diversity-focused activity gets results, and my question is: what results? A more diverse body of students studying neurology? And if that is the answer, then who cares? What is your argument that increased diversity makes neurology or science better?

If diversity is your objective function, fine. But there are other goals to pursue, and which should be pursued in academia by faculty. I think diversity is very far from what should be the top priority.

The advantage of diversity is that it is an easy metric to understand, pursue and make gains in.