I see your sarcasterisk's. You make a choice to play pro football, and no one forces them. there are known risks when you sign that contract, and accept the money. It's the same if you get in a race car, ride a bull, become an astronaut, or ride motorcross. Either accept the risk or chose not to and do something else.
I do agree something should be done about the helmets. They are weapons or armor. Scale back the helmets so people can't lead with the head. There is nothing that could have stopped the bowman play. It's just unfortunate. If a leg is planted, and someone rolls into it. then things are going to get 17ed up. Officiating the violence out of the game is an impossible task to be consistent with.
I also agree lawyers are a problem.
ETA: The only thing I can figure that has made concussions go up is more and more tech in helmets. Of course athletes are bigger and faster, but I still think it is the helmets.