I'm gonna be real with you: it was fun. I was never the best athlete or trombone player when I did marching band but myself and many other kids who honestly didn't have a future playing sports at a collegiate level had genuine fun playing and practicing.
And after school is literally the most convenient time to practice for everyone involved including coaches, parents, and students due to the peculiarities of American living. When I was in school around half of American school children played some kind of organized sport and most probably got the same night's sleep as the other half that didn't. At the collegiate level they do what you suggest and often have two practices a day in the morning and evening for the biggest sports.
Speaking from Europe: after school is literally the most convenient time to practice for everyone involved too. And while sports are in non school clubs, some of them are indeed quite involved. Some are 3 times a week, others 1 time a week, but competitive ones are 4-5 times a week or more. By more I mean including weekend and sometimes morning practice. I know kids that have these amounts of sport now with dancing, soccer etc. I did swimming and we had 3 times a week morning practice back then.
I kinda feel like this is one of those situations where Americans think their system is exceptionally inferior ... in ways that are not actually that much dissimilar to what other countries do.
Well that's just it I don't believe it's inferior. And most Americans will gey their kids into some kind of sport if they can afford it. As the saying goes: a good kid is a tired kid.
I'm all for everybody doing sports, and I can see massive advantages in integrating it with school life. My teenager refuses to do any sports or other extracurricular activities other than gaming and D&D, so he only gets the regular couple of hours of PE at school. I'd love it if I could get him to do more than that.
But training every day sounds a bit much. As far as I know, even youth football clubs around here only train 2 or 3 evenings a week. Maybe more if you've got a shot at going professional? I've heard of fanatical swimmers swimming every morning before school, but those are exceptions. I did martial arts, and that was just once a week.
And after school is literally the most convenient time to practice for everyone involved including coaches, parents, and students due to the peculiarities of American living. When I was in school around half of American school children played some kind of organized sport and most probably got the same night's sleep as the other half that didn't. At the collegiate level they do what you suggest and often have two practices a day in the morning and evening for the biggest sports.