Scary, but not at all surprising to me. I watched Any Given Sunday, they did some homework and kinda got a clue to how those players did anything to play the game. Which brings me back to the CTE cases, yeah there's plenty of concussions, but we're talking about players playing on drugs, likely living on top-notch pain killers throughout the season just to get through the day, probably abusing street drugs when they can't get it from the personal doc or the team doctor anymore. Abusing alcohol, who knows what else they do in their top dollar lifestyles. Combine head injuries and drug abuse and sure some 30 old's brain would look like that of a 120 year old's. There's nothing fixing helmets and softening up the game can do about that.
CTE didn't kill Seau. Depression killed him. Drinking, unemployment and undisclosed pain from previous injuries and a desire to escape from it all is what killed him, unfortunately.