With all due respect to you, I played college baseball and have been a part of sports my entire life. Outside of talent level, speed of the game, and competition level, there are aspects of the game in all sports that don't change regardless of level of play or age. The fundamentals of youth football still apply on the D-1 and NFL levels. There are pillars of the game that do not change and are still taught and emphasized on all levels. If you don't believe me, go ask a coach or former player on those levels.
I have several friends who played professional baseball, three made it to the show and spent several years in the league (one pitched in and won a WS ring with the Marlins). They all will tell you, the fundamentals of the game they were taught at 9-10 they still work on at the professional level. The same problems they encounter at the professional level fall into the same category they did on the youth level. It is just harder to fix because you're facing a much higher level of talent and competition. The fundamentals of all sports do not change just because the level of play changes.