The NFL thinks they can just keep tweaking the rules to fix the fundamental problem that football is a violent sport, prone to both acute and chronic injuries. They can't. Players can't make tackles at full speed but roll off in between contact and hitting the ground. They can't stop a juking running back in the open field and guarantee that two helmets never collide. It's just not reasonable. There's a decision to be made: either football can be transformed into a reasonably safe sport, which will require a massive overhaul of not only the rules but how the sport is played, or it has to be treated as an unsafe sport like MMA or boxing. Of course, I just read a lot of "Cousins couldn't hit the broad side of a barn" comments after the game and I didn't think that was very fair.