Yeah, because this wasn't an obvious issue 15 years ago.
Why is it all of a sudden the world declares "Oh my god... who knew slamming your head into something hard over and over caused problems?" I know the NFL said it didn't, but every ****in' neurologist in the world did. All they did was give the condition a new scientific name (Chronic Traumatic Encephalopathy) when any moron could observe NFL players acting 'punch drunk'.
Also known decades ago was the danger of suffering further brain trauma while already concussed.
Fans acting all outraged now spent decades willfully ignorant of the obvious, and frankly can kiss my ass.
A lot of jobs in the world come with risks... some far greater than NFL players. They also make a hell of a lot less money.