There are plenty of real life examples of this, from softball leagues that self-sort based of levels of seriousness / competitiveness / aggressiveness, to people actively avoiding going into areas like investment banking or high-pressure sales because they have a reputation of being very aggressive.

You can’t always avoid people who are aggressive towards others, but I’ve found that my life is a lot more stressful when I work with aggressive people, so I actively try to avoid these situations and work in more collaborative environments.

People sort themselves into cliques and bubbles all the time?