Just--I agree with you up to a point. Except, I think there are more people than you realize who dream about seeing their kids up on Carnegie Hall. If anything, the parents in the youth music scene are even more frenetic, cutthroat and emotional than in baseball, because competitions are judged rather than umpired. You just don't see the elite musicians because they spend as many hours a day in section practice, rehearsal, lessons, and theory/composition study as the elite athletes do in their training--the worlds tend not to cross because they are both so time-consuming. In music, kids are thought of as starting "too late" because they began playing at age 8 or 9 instead of 4 or 5; they are judged to have little chance at becoming an elite musician because they didn't start young enough. It's insane.
Beeper, taxi driver to athletes and musicians