Multi-stall loos are better in several respects for women with children in tow, especially children of various ages, including girls who can use a toilet themselves but are too young to go into a rest room without an adult for safety reasons. Multi-stall loos are also more convenient, safer and quicker for girls in pairs and small groups.

Single toilets in enclosed rooms pose more dangers for girls and women than multi-stall communal ones, as they are easier for abusers to push someone into and lock them in - and easier for men to place spy cams in.

Single-room toilets tend to be much dirtier and smellier, especially if used by both sexes, than female-only loos coz boys and men tend to pee all over the seats and floors, their urine often stinks, many males do not bother to flush, and some jerk off in private loos too. Also, many men customarily leave the door unlocked or even ajar, creating the risk of a lot of embarrassment and perhaps worse for girls and women.

Multi-stall communal toilets are also safer for people living with physical issues that can be impairing but which don't qualify as full-blown disabilities. Such as diminished sight and hearing, balance problems, dizzy spells, fainting due to rapid blood pressure changes, or who might suddenly find they need help due to miscarrying or going into labor.

Single toilets in enclosed rooms are far more likely to be taken over by drug addicts or homeless people, and to be vandalized - which means facility managers are much more likely to declare them "out of order" and make them unavailable to anyone. So private toilets often mean no toilets.

Getting rid of men's rooms with urinals is not only inefficient in terms of space, it's very bad for the environment, as urinals use far less water than toilets and need less water and cleanser - and staff time - to keep them clean. Moreover, making all toilets single-use and mixed sex will expose women and girls to far more pathogens coz males in public facilities rarely wash their hands even after they take a crap, and rarely wash after sneezing or coughing into their hands or touching their noses and mouths - and when males do wash their hands, they are far less likely than females to do so correctly. This means women and girls will come into many more pathogens in kind and quantity by having to use toilets - even private ones - in which they'll be touching door handles, locks, flush levers, faucets, soap dispensers and loo rolls that have also been touched by a bunch of males.

Professionals have put a great deal of thought over many, many decades into the best way to design and provide toilet provisions to the two sexes that is fair, safe, hygienic and best for the environment. You and your allies seem to want to disregard all this history and learning - and also to ignore and override the needs and best interests of all other groups, and even the needs of some of yourselves at later times in your lives - to meet your own personal preferences in the present.