The NFL players should be worried because it provides an out to the NFL that CTE develops from playing Football long before they get to the NFL and seems to have little to do with the NFL itself. It indicates it has more to do with the amount of time spent playing. The NFL could very well use this study against the players.
I'm certain that Deion's wife isn't saying that because players/parents choose for them to play football as kids, in highschool, through college in the hope of playing in the NFL that puts a burden on the NFL to pay for them. That argument would defacto put the burden on any player injured in an attempt to obtain a career in the NFL.
If they win on that, I'm going to start suing Beer companies for all the practice I put in studying their product in an attempt to gain employment with them.