I think the others are safer. it would be impossible for me to see any women hating content on let's say, Instagram, because they have an algorithm there. all I ever see is cat pics and knitting photos. the algo has taken years to learn about me and has put me in a very safe bubble of content that I want to see.
that's the deal with nostr though, isn't it. Because there is no algorithm here, a person sees everything and they themselves are responsible for curating their content. each person has to find their tribe to feel a sense of belonging and acceptance, otherwise they don't see the value of nostr as a social network and they leave.
the state of nostr right now is that the user population is low and the majority of users are men. Good, socialized, well-meaning men but also some are very poorly socialized men who are attracted by cutting edge tech, radical politics and fringe economics. People tend to bubble up with those like them. Other social medias do very well keeping the boundaries of these groups very strong via algorithms. Two people can be really into fitness but the gym bros and the granola yogis will rarely cross paths.
nostr doesnt have strong boundaries because there's no algorithm. the big bubbles bully the smaller ones. Eventually they pop and disappear because no one wants to stay in a space where they're unwelcome.
Instead of implementing tech tools to mimic social control, it is more important for the longevity and growth of nostr to draw more different types of people in. We need to help and grow the minor bubbles so that there isn't an overpowering majority. I think that is when we'll have much safer spaces on nostr.