What do you think about this woman

>If they really want to, then only they have any say about it.
How is it alright to let someone mutilate themselves based on mental illness? If they're not in their right mind, then it's obviously unethical to let it happen. Should I be allowed to have one of my arms removed if I identify as someone with one arm? No sane doctor would let me do that if my arm was perfectly healthy and the only wrong with me is my cognition