[aninhumer]

Well sure, if you define "inequality" to mean any differences between people, then it includes diversity.

But of course, what people are actually talking about is inequality of utility, which is a mostly distinct subset of that, and fairly unambiguously bad when considered on its own.

You can then argue that inequality is necessary for other good things, but you're going to have to try harder than vague rhetoric like the "basis of life".