I've seen people say that /uj is essential to keeping communities healthy. If you only allow 'reasonable discussion', you allow all kinds of awful people in as long as they're not too obvious, while regular people get reprimanded for responding to it. But if you only allow shitposting and no genuine discussion, it's going to become genuine whether you want it to or not (see: Gamers Rise Up or similar)

On here, you can see people write earnestly on a bunch of different topics, but you can also see them just tell a promptfan "you can't get it up unless the fingers are wrong, can you" and ban them. It's great