Concussions are no joke. I respect Chris' decision. It's a tough but smart decision. A lot of players are going to take this route. I spoke with Chris Nowinski of the sports legacy Institute after a distant relative took his life due to complications with CTE. It is a serious problem that most football players will end up with.
After speaking with Mr. Nowinski I wouldn't let my kids play football unless something changes in head safety. From how I feel everyday and understanding how a lot of NFL and former college players feel everyday it's scary and I do not blame them for retiring early. (But I do feel they are compensated well for these reasons and it is a risk that they sign up for)