This doesn't make sense to me.
Tom Brady blew out his knee a couple of seasons ago, did several million kids stop wanting to play football that year?
I'm a huge Knick fan being originally from NY. When Patrick Ewing blew out his Achilles, I didn't get thrown off and stop wanting to play hoops.
UFC Fighters, Pro Boxers, Hockey Players, Baseball players... Actually, almost any sport... even GOLF can cause injuries.
Ronnie spent years of his life abusing his body with drugs and by throwing hundreds of pounds of weight around in the gym. Do you think he was coming out of that injury free???
Injury is a part of all sports. If you are afraid of a shortened life span or getting injured, consider competitive Chess.