In a perfect world they wouldn’t. But its hard to ensure that everyone gets a traumatic free childhood, or that any natural insedent traumatise some people to the point where they cant/won’t be helped. I guess the downvotes is because your comment feels too unrealistic idealistic (otherwise I can’t see why)

But it doesn’t have to be the same group in the population. Probably a portion is the same but the larger picture is all those you help up again so they can help support the community/country/state, and the price is helping the group that otherwise make the community unsafe so they in large can … act decently to others and live a life without violence