But you're not happy if you're on the receiving end of any discrimination.
Don't you see the contradiction there ?
Anti-discrimination policies are about ensuring people have equal access to services and facilities (whether it's contentious toilets or hotels or whatever).
You seem to indicate in your jurisdiction that renting an apartment without safety rails is OK, but in many others it's not OK and you'd be in violation of safety laws (and also discrimination laws). It doesn't matter that you live there sometime - you're renting it as a facility and should be expected to comply with safety and whatever other laws apply. And if you do it via AirBnB, you also need to comply with their rules regardless of legal requirements. And AirBnB get to change the rules when they want and you either agree or stop using them.