I feel, as a FWR lurker, that I would have seen linked articles to bank up the fact that trans identifying men aren't safe in men's loos, and therefore that's the rational why women should budge up and accept trans identifying men in their spaces.
I'm pretty sure with a quick Google I could fund evident that trans identity men have made women's spaces unsafe (Kate delowski? The one who worked for a charity and made a masturbation video).
So AIBU to wonder what hard evidence there is?