True. Especially after the u-21 era these guys are forgotten.
Compare the last German and Italian u-21 teams. Those were, together with England the best teams in the tournament and Italy could have even eliminated Germany. They weren't inferior.
But while 6 of the German u-21 kids made the German WC squad, and some, like Neuer, Ozil, Boateng and Khedira played a huge role in the team, and others like Beck, Aogo, Castro, Boenisch, Howedes, Ebert, Marin and Hummels are among the best players in the best German teams, most of the Italian u-21 stars are either reserves in their teams or they play for smaller teams.