Some fams have plenty of reasons to exist on PS Home. Some exist to make it a better place for other users and give them a sense of belonging, some exist to cause trouble for other users. Some even hosted Home events to give out prizes and enjoy a good time and even have a strict code of honor when it comes to respect and dignity.
Sometimes you have to tell apart a good group of fams from the bad ones.
I don't bother with fams because they're not for me and I don't want anything to do with them but I'm not stopping others from joining.
I sometimes do find it pointless to change your pop-up color to be accepted to join a fam because it takes away the individuality and diversity that Home was meant to be in the first place when it was first created.