in much the same way no couple should have one shared bank account and no separate bank accounts of their own
you should not have one shared social circle. like absolutely, it's a red flag to hate all your partner's friends or for them to hate all yours
this is the danger of some polycules and the whole social sphere being contained within the polycule like. that is bad. you should have broader links and friendships and relationships outside of that intimacy, bc its all about community support
like ppl think about breakups and abuse and stuff, and like. in the same way a sole shared bank account is bad bc it allows for no freedom, like
you should be able to vent knowing ppl don't know the others involved
but also just. its positive?
like you can discuss surprise plans or talk about gifts or whatever without worrying about someone else's personal connections to the convo
its good to have that diversity of social circle as well as being safer