The goal isn't diversity, though. The goal is meritocracy, with diversity only desirable insofar as it enables meritocracy.
> The goal is meritocracy, with diversity only desirable insofar as it enables meritocracy.
In other words "The goal is anti-diversity, with diversity only desirable insofar as it enables the anti-diversity goal."
Meritocracy is not anti-diversity. Meritocracy is correlated with diversity. Choosing meritocracy where they diverge is nothing more than accepting that diversity is not the one true goal of all things.
The old great metaphor for America was that it was a "melting pot." The metaphor comes from smelting. When you smelt metal, you're not promoting diversity - you're creating a homogeneous alloy. You also skim off the slag and throw it out.
It's not a particularly pleasant metaphor when you think about it.