I guarantee that if I ever find myself facing federal prison time my long repressed female gender identity will be front and center.
You're the nineteen-millionth male I've heard express this sentiment. Okay, maybe an exaggeration. But nearly every single adult male I've talked to about this has expressed that if they were to find themselves in prison, they'd want to identify as a woman and be moved to the female ward. I've even heard several females express that sentiment with respect to their male spouses and children. Given the option, that's the rational thing to do.
This is a pretty clear acknowledgement that in general, males are more dangerous and more prone to violence than are females.
And of course, everyone believes that they themselves, or their male relatives and loved ones, are the 'good ones' who would never present a danger to a female. Most of them are probably right. Most males aren't a danger. But enough are that as a group, males are dangerous. Males are dangerous to other males. And males are even *more* dangerous to females.
The problem is that allowing 'good males' to self-identify their way out of the dangerous male ward, and into the safe female ward... it also explicitly allows the 'bad males' to do the same thing. All it accomplishes is a shifting of the burden of violence onto female people who are smaller, weaker, and more vulnerable.
It is absolutely in the best interest of males to find a way to get the system to place them in the female ward. It's in the interest of both 'good males' and 'bad males' to do so.
But it is definitely not in the interest of females to allow this to happen. It incontrovertibly places females at increased risk and danger, reduces their dignity and humanity, and violates their boundaries and consent.
TL;DR...
Males: This is good for me personally.
Females: This is terrifying and dangerous to the mental and physical well-being of myself and every other female in this position.