I think it should be assessed on a case by case basis. There are transwomen who would clearly be in significant danger in a male prison, have never harmed a fly and present absolutely no danger to female inmates.
It's always quite extraordinary to me how the status of the man involved is what's up for question. Never the women who have to put up with it.
Ask yourself what is in it for the women? What, exactly, is the benefit to the women?
And when you realise that they haven't even figured in your analysis, ask yourself why not?
It's always about the potential effect of the male prison on the man. Not the effect of a suddenly mixed sex prison on the women.
Even when people want to protect women's rights, they find it hard to drag their focus off the men involved in violating them.
These women are incarcerated. It doesn't matter how you risk assess the male in question, if he is saying he is a woman, he is already displaying sexism. If he has asked to be transferred to a women's prison, he is already disregarding women's boundaries and putting his sense of entitlement first. Plus, of course, he's a criminal.
It's not just about whether he's already a sex offender (of course no male sex offenders should be anywhere near incarcerated women), sexist, entitled men who doesn't give a shit about women's boundaries can make women feel petrified and humiliated without even trying.
A lascivious look, a humiliating statement. Why should women put up with any of it, purely in order to validate a man's feelings.
The very concept is misogynistic.
And look at the lack of symmetry.
Incarcerated women, the majority of whom already suffer injury from domestic violence, get housed with male criminals against their will.
Meanwhile, men, violent or otherwise, get given incarcerated women as a handy validation tool.