Ummm yeah! But it's not so rare. It's called being a GUY.
It's going to be unpopular here but I'll say it. That woman is the manliest looking 15 year old female on god's good earth. She walks like a man, talks like a man, has muscles like a man, and the general countenance of a man.
People here are treating her case as if she were clearly a female and so are giving her a lot of leeway to be whatever gender she wants. But they are going to be crying foul play if she turns up a man and she is going to be cast a villain for it.
What a difference gender makes, right folks?
Own up to the gender favoritism, kids. When we think someone is a woman, we make psychological concessions, and any big bad man who suspects she might be male is unfair.
None of the crusaders for her cause to be any gender she desires is thinking of her competitors or of the general concept of fairness.
If she has such spectacular genetics, let her compete with the men.