There is not much conflict between these positions. Will focused on ever-increasing brain injuries, not mortality. You can survive to a normal life expectancy with a defective brain.
And sorry to point this out, but it is not only positive traits that are encouraged by football. In my high school, essentially all of the bullies and overall jerks were on the football team. In fact, if you made a list of the biggest jerks and compared it with the football roster... Hey, wait! It's the same list!