With a small, coed restroom available (one person at a time) they can go to the bathroom in privacy.
Actually, that law helps the rest of us.
Do you want them in your bathroom next to you or in your wife's bathroom next to her?
A bloke who likes wearing tights and pretty frocks probably isn’t likely to be interested in your wife. He’s more likely to be interested in you....
I got the impression that the law just made existing facilities available to ‘anyone who wants to use them’.
So even if there was a coed restroom, if a man wanted to ‘use’ the ladies room, he could.