The gender stuff is so nonsensical to me that I can't help but instantly dismiss every idea/argument that gets attached to it.

From what I've seen, I can at least say that homosexuality is often a fad (I guess that'd count as a social construct). I see it a lot in kids and immature adults. The way it gets flaunted and displayed, that's not how a sexuality presents itself normally.

We could perhaps make a supply/demand argument as well for homosexuality. Low supply of decent females. And a lot of homosexuals strongly desire hetero partners for whatever reason, so that's a high demand from them.