Ya ok pro wrestlers put there bodys through more "pain" fine i'll give you that one even though i don't agree with it.
But theres a big difference between rehearsed pain where you know whats going to happen and you've been through it before, and pain where your not sure if someones going to punch,kick,slam,shoot on your, the difference is very large.
I'd rather jump around and get slammed on my back when i know its comming then get a flying hook in the face by chuck liddell.
Btw i don't see any WWE fighters getting knocked out during there fights and a knock out does more to your body then a bunch of silly canvas bruises.
What is it that is going to be on your mind when you're on your death bed? Will it be the tedious years of 9 to 5, or the memory of some great acheivement. Maybe a moment you stood in glory to the applause of millions.