As an autistic person this has never made sense, the things people are willing to do in order to fit into a group, like at it's extreme murdering others. After becoming aware of my diagnosis I've started studying "normal" people and it's insane what you are willing to withstand just to belong to a group or in society. Now I think that some things "normal" people participate in they think is actually fun, like hanging around others doing nothing productive, which after reaching 40 years old, and having a burnout, I also now enjoy just hanging around and belonging to a group. Also social capital, or belonging to a group, has many positive advantages.

Even HN has these rituals. You have to downvote when someone randomly mentions Gaza, e.g. this comment.