What confusion does it create?

You may genuinely not know the gender of an online nickname, and, frankly, you also don't really have to know? Why share this metadata in the first place.

I kinda see your point regarding "it pulls in culture war", but, to be fair, it's "they/them". Language that - in this very usage - predates the culture war by centuries.

So.. idk I think you might be wrong here.