Obviously, the game's franchise players need more protection. But that's easier said than done. It's a violent, collision sport. The objective is to tackle the guy who has the ball as hard as you can and take the ball away from him. As a quarterback, you make him throw it bad.
Intimidation is part of the game.
It's the reason people rush as hard as they do. The NFL has changed the rules in recent years to force defenders to back off. Big Brother on Park Avenue is now monitoring the high, low and late hits on quarterbacks with a heavy hand. I don't think there's any place in football for that. You wish you could legislate intent.