I'll spam this fact wherever I see comments on CTE.
CTE is not correlated with the number of concussions. It's correlated with years of exposure to repetitive minor hits. It's a very important distinction because the NFL (and every other professional sport with blows to the head) is trying to push the narrative that concussion is the boogeyman, so that if they can reduce concussion (and they can), they can declare their hands clean from CTE. The only way to reduce CTE is drastic changes to the game.