A sane reality, where people are valued they way nature values us, is a rare situation in human history. Obviously, pre-modern man did not want to waste each other's time or happiness for no good reason the way more "civilized" societies do so casually.
So, since natural law is ignored (to enhance investor returns), reality isn't "normal". And that's why kids do not need anyone to tell them "life is fair". Parents often ask their children who say, "it's not fair," who told them life was fair. It's a good question and the answer is they inherently know life is fair.
And the inevitable result of an imperfect system is a lot of people thinking, "it's not fair".