Kids get hurt and die in other sports almost as much as football, depending on the sport. This is a
PR thing not a reality thing. Also most kids will never play beyond high school. I think people will just have their kids play later and not so early which is a good thing IMO. But it will never completely die when the carrot for scholarships and professional opportunity will be out there. Even if schools decide to drop the sport all together, there will be some club or non-scholastic option which many will take. Not everyone is going to play soccer or baseball because those sports cost a lot of money to participate at this time. At least at this point football is popular at all levels that I doubt players will completely stop participating. You might have fewer teams and more consolidation, but I do not see it going completely away even in 20 years.
Peace