I don't really understand how it moves over into other parts of life. Suppose it depends on your parents. I can see how having to work hard to win can, but OK so you don't make the team. What do you learn from that? Well, maybe you don't get the job. So, you have already learned you weren't qualified or the "coach" looked over you. Or, what if you do great in college but don't get into medical school. Can you rely on not getting on the football team.
I just don't think it is that cut and dry. Maybe take all kids and have a rule where they have to play at least one inning. Mind you, next year, maybe they can work hard enough to move into more innings.