The benefits of playing football gets too much play, imo. The benefits of football are the benefits of most team sports, imo. If football does decline drastically, most of the youth no longer playing it will gravitate to another team sport, most likely. As for injury similarities, I do think that sports like soccer are similar unless headers are removed. If headers are removed until later in the sport(college, etc), the kids have an opportunity to be old enough to see the sport without the dangerous component and get the benefits they would get from that, and still be of a more reasonable age to make a decision about proceeding forth in a sport that would then add a dangerous component to it by playing at an age where headers are allowed.
As more is know about CTE, though, I think there is a lot of change highschools and middle schools are going to see. Football, soccer, wrestling, hockey, rugby, lacross, etc. Pretty wide swath of popular sports. Most likely, many of those will have to either adapt or die in many schools.