Mostly because I'm tired of these U.S.A. “diversity” efforts which come down to “more persons from the U.S.A.” overlooking most of the world.

That they apparently think gender defines perspectives more than ethnicity and cultural background is the problem. Apparently they can make an effort towards gender but not toward the issue that plagues English-Language Wikipedia that only English-language sources are used in the end, often even about subjects that are fundamentally not in English such as the critical response of non-English media, being phrased as though it's a global consensus.

Again, I've seen some places where his has recently improved, but it's annoying to, say, see on Wikipedia that for instance “criticism was mixed” on a French film that was overwhelmingly positively received in France because English-language criticism was more negative due to cultural differences.