If you ask me - and im here to present my opinion, not someone elses - the competitors are the one with the highest stake. The decisions of parents should be given as much weight as ours: near 0. They're especially irrelevant when talking college+ athletes.
How one claims they feel or decide to present isn't qualifying to change sporting categories (how would it be controlled?).
The biology underlies the current day status quo. If the argument is to be made on biology, is it measurements? which measurements? physical surgery? age of transition? What rules might you propose that is robust against exploitation? The burden of proof belongs to those wanting to change the status quo.
#2 undeniably exists in the world, but why is it constantly being pulled in this thread to taint those trying to talk about #1.
the moralizing tactic of "you dont watch volleyball, why do you have an opinion? only bad people talk about it" is not polite discussion.