>>16776578 (OP)
Humans are social pack animals. As an individual, I seek out those similar to me. Once there are two of me in my group we begin accepting more into the group. If I notice you demonstrate behavior consistent with and good for my group, you are rewarded by being granted an invitation to my group, and may even be allowed in my group. This can be as subtle as how you handle small talk and bants. If I notice you are not a fit for my group, I will ignore you.
However if my group and fifteen other groups have all deemed you unfit for our respective groups, we mutually understand that the problem is not merely that you are unfit to be in any of our groups. Instead we recognize you as a problem, and will signal to other groups that we have noticed this problematic behavior by proving you are not a member of our group. You see, if you're a problem and you're in my group then we're a problem as well and I cannot have that.
Sometimes the band of rejects gather and make it easier to classify who the unfit are. I may feel bad for you, and you may be unfit for reasons outside of your control. But that's not my problem and I will not make it my problem either.
This is why in olden times only the retards, I'm talking the ones who spastically slammed their hand to their chest were bullied. In the millennial generation there were socially maladjusted people (now just downies, but sheltered aspies due to old genX parents) who got ostracized (i.e. most of 4chan 30+ oldfags). Today, most of genZ is absolutely fucked in the head and I don't even understand what behaviors they penalize. Then again almost none of them have friends in the first place (no, online doesn't count), so it's like they're bullying themselves kek