I want to make this clear too: I have trans people in my life. I would never interrogate them on gender or sexuality and judge whether it was “valid” in this way. I do get why the whole concept or anything adjacent to it could make people lose their shit.

That’s not what’s going on here, with this user. The way you said it is a good way. They’re not even claiming to be transgender, that I know of, and the only conceptual overlap is that of pronouns, but somehow that is enough to trigger this thing that I think is protecting them and putting them in the “ally” category.