It is just one of the many inconsistencies in the trans movement.
If a transwoman expresses fear and discomfort at using the men's toilets they are given sympathy, understanding and have their concerns listened to and taken seriously.
However when women express the same fear and discomfort at sharing toilets with men they are mocked, ridiculed, have their concerns dismissed, given the whole "not all men are out to get you you know...and women are capable of assaulting people too!" spiel...in short they are not taken seriously at all.
There was a poster on a recent trans thread who stuck around for a bit and arguing the usual but not all men/transwomen are a threat and women assault people too. They then later went on to ask what about the poor transwomen who might be assaulted by violent men in the men's toilets but failed to say the glaring inconsistency in what they were arguing.
The inconsistency is so obvious though and it's staring at them right in the face. If the majority of men are not violent and women are just as likely as men to be predators, why are transwomen so desperate to be let into the women's toilets? Surely they'd be in just as much danger in there if what the transactivists are saying is true?
Speaking of inconsistencies, another obvious one that I'm amazed people don't notice is the whole gender identity and self identification narrative that seems to be in right now.
The argument that is used for transwomen to use women's toilets is that they are at risk of being attacked in the men's. But at the same time there is a huge push for people to be allowed to decide their gender on a whim and be able to self identify. Am I the only one that sees a huge problem right there? So it's risky for transwomen to use the men's so the solution to that is to allow anyone to be able to self ID their way into the ladies...yeah that makes perfect sense 
So what exactly is stopping a man from declaring he is really a woman and following a transwomen into the women's toilets and assaulting them or harassing or intimidating them there instead?
On a sort of related point, it kind of reminds me of how women are told we need to take responsibility for our safety because you wouldn't leave your door unlocked and you wouldn't do x or y....blah blah blah. But then we do take steps to keep ourselves safe we are accused of tarring all men with the same brush, of being man haters, paranoid, etc. We just can't win, can we?
Now picture this; imagine a woman using a unisex toilet in a deserted train station or a nightclub. Now imagine a man walks in and sexually assaults her.
Now what do you think the response would be? Sympathy? Or would it be more along the lines of "wtf did she expect using the unisex toilets in those situations?"
I know which one I think is most likely.