Men certainly should be allowed to crossdress, sashay around the room, and adopt whatever other aspects that our society has termed feminine.
But given the rigid gender divide in our society, some people don't want to be men-who-do-stereotypically-feminine-things; they feel they belong on the female side of the rigid gender divide. That's fine with me. I just don't want all of us here putting any effort into reinforcing that rigid gender binary and insisting that's the way it has to be because of Nature and Biology.
LOL. Humans are hierarchical, Paula. If you don't see women that way, just wait.