We can try and create our own superstars, but that has only happened twice in the past 20 years, with Zidane and Del Piero.
Zidane was a well known name prior to his arrival (not a superstar yet), but great things were expected of him. Del Piero was close to leaving for Parma (thankfully that never happened), and he is one superstar we truly bred.
Nedved, Buffon, Baggio, Davids, and numerous others were already acquired once they had established themselves. Breeding our own superstars isn't that simple, and there is no guarantee that any of the current batch will turn out to be anything special (let alone unearthing a gem of a striker).