While I agree that combat sports don't attract the brightest people, I don't think it is fair to blame the sport for people having problems. Life is hard, and our society has set the stage for this. If we are blaming the sport, then we have to blame the society that created the situation where people engage in human cawkfighting to pay the bills. I agree that combats sports can cause injury and head trauma.
I have long advocated for state legislatures to do their job and look out for fighters, the way
California is trying to do, by making fighters eligible for the boxing pension fund, with a minimum number of bouts. This is about more than just combat sports. It is about the nature of life, in general. If these guys weren't punching each other in the face, they would likely be doing something else dangerous.