> The solution to the “female only”

Landlords/sellers aren't typically the limiting on gender (because they legally cant), but the renters/buyer's "self-select" process is sexist/racist. People post advertisements on FB looking for a new roommate of certain type.

If anything, landlords in my area subrenting / house hacking are better at managing a home with mixed race / gender than people "self-selecting" with racist/sexist ads.