why are so many top boxing trainers damaged?

[prometheuslord]

just looking at some of today's top trainers, floyd sr (got shot in the leg, which destroyed his career), freddie roach (parkinson's), ****m richardson (stroke that numbed half his body). does that damage have anything to do with their status as top trainers? does it give them more focus, inspiration? it certainly feeds into the famous stereotype of the grizzled, scarred old trainers.

what do you guys think?