Women and men can still be "real" in the sense of being strongly correlated trait clusters. And indeed, these are the only two clusters of significance.
Tens or hundreds of millions of people are trans or non-binary. While I agree that there are two primary clusters, I strongly object to the idea that so many lives are of no significance.
That's about an order of magnitude higher than what I would expect (note that the trans and non binary rates are much higher in the West likely due to different chemical exposure).
Women and men can still be "real" in the sense of being strongly correlated trait clusters. And indeed, these are the only two clusters of significance.