Weeeeeeeeeeeeeeelll, you are still missing the point. Really... your logic is impeccable, but life isn't all about objectivity. Humanity is all about subjective interpretation of the world around us.
The elephant in the room is that we institutionalised women are happy with our label. We really truly don't want some man wandering in and telling us that now he has decided that he wants to wear our label. In fact he likes it so much he has decided that if we want to carry on wearing it we have to include a qualifying word, just so The Man can wear the label without feeling he is being side lined.
In fact, if any woman, sorry female, decides to tell The Man that he is being unfair, illogical and is team rollering all women, sorry, females, that woman, sorry, female gets a new label... TERF, a hate filled label that is all to do with how upset The Man is that women, sorry females, don't want to let him take away their core identity.
Do you see how that might make a lot of females extremely pissed off?