I think one thing that gets overlooked when you're older is that winning is important to a youth. Sure, I look back on a lot of sports I played before I was the old man I am today and realize that nothing life changing or important came out of those games, but that isn't how I felt in my youth, and I assume the youngsters playing today feel the same.
I remember getting butterflies in my gut, the excitement for the game, anticipation to play, the preparation, trouble sleeping the night before - the happiness from winning and the sadness from losing. We overlook this as adults because we know in the grand scheme it is inconsequential for about 99.999% of the participants, but they don't know that and winning is everything when playing (I'm not talking about 9 year old little league, that's for fun, although winning still makes it more enjoyable). Although, I do remember a pee wee football season from when I was 9, we went undefeated and played and lost in the pee wee regional finals (or whatever they were), I was crushed.