Or the college level, at least for the players who are at risk. How are schools going to ask unpaid players to sign a waiver to play football so that everybody can make money -- except the people whose brains are at risk? And even if they had the balls to ask, what percentage of college players think they have enough of a legitimate shot at NFL millions to sign it?
At some point HS and college football will have to morph into a much different "football light" version. The NFL will have to decide whether it wants to follow suit, or keep playing "real football" with waivers and such. If that's how they want to go, they'll have to start running their own developmental league that HS players with pro aspirations can go straight into instead of college. Regardless, it isn't going to be the same in 15 years at all.
As I said, the guys who think this is just a toughness issue are fools. It's fine to ask a 21 year old man who's making a lot of money to sign a waiver. What about the previous 10 years of his life that it took to get him to get to that point?