Translation:
"Working harder and being even better is a loser mentality son. Let daddy try and fix it for you by crying to a little league president about "fairness", or lets take our ball and go home." Signed, a "marine".
Your suggestion shows why your daughter is making dean's list at ITT. Marine's son works hard, is better than the others, and is deserving of the selection. But due to politics/unfairness/letting it go, he doesn't get selected.
Your suggestion is to just work harder and become even better. How the fvck is that a way to make politics/unfairness disappear? He could work harder than every other player over the next year and become the best player on the team instead of the third best, and politics/unfairness could still keep him on the bench.
Your theory is just to allow unfairness to continue and hope that a better effort next time will make it better. Hell of a theory to portray for your children: "hey, kids, everything is out of our hands and will take too much of a fight and too much energy to make right, so just continue to work harder and hope you don't get fvcked again . . . if you do, well, just work harder again."