Many businesses only have one toilet, so men and women both have to use it. The difference is, if there’s more than one, you can use any one you want. As long as it’s single use (only one toilet in th bathroom), it wouldn’t matter, EXCEPT, that it’s a slippery slope. Other than that, my husband tells me that some men’s bathrooms are really nasty. So for hygiene, I’d rather not share a bathroom with a man.
People have been using either single use bathroom with a lock forever.
Yes, women get the raw deal since they don’t clean the men’s room near as often.