There is nothing worthwhile in diversity in and of itself
This is the attitude that needs to stop. Diversity may not be a value in your pantheon, but it's not social engineering to want an inclusive society. It's wisdom.
Why does it need to stop?
A huge problem -- that few people seem to speak about -- is that using gender, nationality, or, most frustratingly -- race, as a measure of "diversity" is implicitly bigoted.
The diversity that people _claim_ to want is one of perspectives, life experiences, etc.
The things that are relatively easy to bucketize - gender identity, race, socio-economic status, etc.... these things in and of themselves are not a valuable source of "diversity"
The implicit bigotry in the "diversity" argument says that, if you hire more black people, you'll get much different ideas than what you already have. Why? Because all black people are different from the white people you already have.
I've never seen a more stark illustration of _racism_ then that.
The conjecture here is that if a population distribution doesn't' look the way certain people expect it to, then there is some upstream social problem that needs tinkering with.
That conjecture is only ever true or false on a case by case basis. The real problem that needs to stop is for people to believe this conjecture in the general case; the real problem is that people don't even agree or are not willing to state what their expectations are for the "ideal" population distribution, but, are still willing to cry foul and to assert that a problem exists.