Actually most people who go into boxing do not get destroyed from it. It has a far lower injury percentage than football. The myth that persists that boxers become "punch drunk" really came from the era of the 15rd fights. A fighter can't keep up hydration levels into those last 3 rounds and thats when brain damage would occur. Ali having Parkinsons didn't help much either. Now granted boxing is more dangerous than a lot of sports, but it is by far not as dangerous as football or hockey when it comes to being hurt from playing it.