I am an older football player, and I know literally hundreds if not thousands of former football players. The vast majority, who've almost all sustained concussions, do not exhibit the sensationalized symptoms that TV/News have made commonplace.
I also know a huge percentage of former professional boxers, almost all of which demonstrate tremendous signs of concussion symptoms.
There is no doubt that head injuries are not good. Nobody debates that, but, there is no current way to determine the severity or consistency of effects on any one person.
No a football game is nowhere near as important as a life. But, it's a fundamental RIGHT to choose to play football. Everyone knows the risk, nobody is throwing anyone in the lion's den against their will.