I think the danger is that it may be abused. There’s a potential problem if students who identify as male (and are viewed as male by female students) start to use toilets without urinals. It could become a way of harassing female students.

Having said that, I think all toilets should be unisex. I regularly use the toilet labelled ‘gents’ if I know it’s just one cubicle and there is a queue for the ladies. (But I wouldn’t use one that I knew had urinals – I think your average guy would feel uncomfortable if I did.)