Whataboutism is an utterly vacuous argument, no matter what subject it is applied to.
On the contrary, I'm calling all diversity good, regardless of whether or not it covers all possible bases. That's your fundamental misunderstanding of my argument.
When you say that diversity of gender is bad because it is not simultaneously diversity of race, and diversity of physical ability, and diversity of sexuality, and diversity of religion, and diversity of whatever your next bugbear happens to be, then you do not understand diversity at all. But heck, we already knew that.
Elimination of one form of discrimination is good. That it doesn't simultaneously eliminate all forms of discrimination doesn't make it not so. Other forms of discrimination can be dealt with at other times. We don't have to fix everything all at once.