It’s not satire, I and a few others have subjected ourselves to their entire comment history to be sure - they really believe they know someone’s gender identity better than the person themselves. They’re also extremely hostile and unpleasant.
Maybe they’re trying to prove that it’s possible to have the wrong ideas for the right reasons? Like at the core this is rooted in a desire for everyone to be accepted as themselves and end transphobia, they’re just taking it to unreasonable extremes.
That’s not an argument, it’s an assertion. And it’s wrong.