It probably isn't going to be outlawed because the NFL makes to much money ( almost a billion dollars a year) to care about the players. If something happens to a player than can always recruit a new one. I know that sounds rather harsh though.
did you know bare knuckle boxing has seen fewer deaths than modern day with gloves? you wouldn't punch someone in the face because you could break your knuckles but now with gloves you just aim for the face.