Men who are vulnerable in a male prison probably inlcude
men who have committed sex crimes against children or the elderly
men who have committed "nasty" sex crimes ie ones with added violence / torture etc
men convicted of child cruetly
men who are gay
men who are not gay but the others think they are gay
men who are "pretty" (if my viewing of usa tv is anything to go by!)
men who have mental health problems (heart rending story the other day I can share it if anyone is interested - man with mental health and drug issues was explited, became addicted to harder drugs, ended up taking his own life, should never have been in prison in teh first place IMO)
Men who are vulnerable for other reasons
The bottom line is that men's prisons should be safe for ALL men. The idea that violence and rape are inevitable in a mens prison is appalling.
There is no reason to move some of these men to women's prisons because they say teh magic words "i am a woman" and start wearing lipstick FFS. What about all the other at risk men? Don't the trans crew care about them? It's all a bit I'm alright jack pull up the ladder.