I can tell you I wanted to retire from coaching immediately. Even without seeing them performing CPR on him, the look on the players faces was not something I wanted to ever see while being "entertained" watching football. As the emotions ebbed, I felt differently, but as I said yesterday, I don't turn the TV on to watch these young men die. I certainly can envision a life without football, and that's something I could not see a few years ago.
To your point, parents are certainly pulling kids in other directions. Our numbers are fairly consistent, but they are not what they could be. I think there's a combination of things going on: Other interests/sports, more couch potatoes, and less family support for the sport. Part of that is you have two working parents that are not as engaged in what the kid does after school. I think there's some concern for injuries, but not to the level that is being advertised.
Football is a lot of work. We practice starting in June with optional conditioning, August with mandatory practices, then practice right after school. The real committed kids lift as well. Maybe 90ish practices just to play 9 games that last maybe 2-3 hours. Not all the kids get in the game. The saying we use is that we do a ton of work, for only 9 games, or paydays. That doesn't include off season lifts, which they need to be doing, and I am sure they do in more "football" type towns. My point is that it's not for everyone, and with the instant gratification of today's society, many kids just don't have the family support, drive, patience, and willpower it takes to want to invest in football. This incidence with Hamlin is not so much another nail in the coffin, but just another reason or excuse to not want to play.