Even in the super lib mindset of "we are all the same", "diversity" creates cognitive dissonance.

If "we are all the same", what benefit does "diversity" bring?

And then the only end response is "why not?".

But why do it? There is no tangible benefit, so why do it?

They call this "progress", but it's not progress for the sake of human betterment. It's just "progress" for progress' sake.

There's another word for that, you know...

It's stagnation.