So what? one in every thousand youngsters end up like Del piero, maybe even less, that's why he's Del piero. The rest are loaded off to midtable clubs where they would get first team play. Rocchi is an example. Just because a player is young, that doesn't mean he's going to be the next Zidane FFS. Get this gay mentality out of your head. It just doesn't work this way dude.
It's quality that brings you success, not age. If a 28 year old can offer more to the club that an 18 year old, I would get the former and vice versa. I'm not saying I'm against buying young players, I just think quality should come before age.