I think that's a fair question. I can only speak for myself; I do feel guilt with how much I've enjoyed the sport and seeing the very real tie to CTE. I feel worse every time someone I remember playing gets diagnosed, or someone younger than me announces they'e got it. Watching "Concussion" in the theatre and seeing the physicians at Boston College/BMC talk on 60 minutes about their research took the wind out of me. Have you listened to the podcast about Aaron Hernandez? Watched the HBO special on Lawrence Phillips? The hits they took during their football careers did not help their already fragile mental situations.
And I was accused of posting an emotional argument above - what about this isnt emotional? It's Husker FB! I remember Sam Foltz, I knew Brook Berringer - their deaths were total random accidents and the state was crushed. Do you think if there was a 1% chance that the university could have helped them avoid their accidents we would all be telling them to do so? We can lessen the chances of players, families and fans getting sick - to me it's an easy decision. Does it take away all risk? No, but don't you want to know you did all you could rather than look back and think, "if I'd only ..."