I didn't see anyone suggest keeping a kid in a padded cell all day.
My son plays baseball and golf, he rides his bike, scooter, skateboard, he roller skates, he swims, then he's ready to play. He is always in motion. He thinks video games and TV are "kind of boring".
What he doesn't do is have other kids charge at him repeatedly with the desire to knock him head over heels into next Tuesday.
Sometimes the effects of having your brain rattled around in your head repeatedly don't show up for years and years.
Ask Muhammad Ali.
I know, I know, that's boxing, not football. But football is a pretty violent sport.
Many years ago I read an interview with Bret Farve (? close enough, you know who I mean) in Playboy. Here was a man important enough to be given a feature interview. That's big. What did he talk about? Farting.
I guess that's when I started hating football. I don't want my son to grow up wasting his Playboy interview talking about farting.
But that's just me.