Wow. Personally, I think it's sheer body volume that kills bodybuilders. I bet you bottoms to dollars if you drop a lot of the size and don't go into the technically obese category, you'll be fine or at least at much lower risk of having problems different from a regular individual. Obese people don't live long, we all know that. Stay away from being obese and hopefully you won't stress the fuck out of your heart and die. I don't know.
It;s really sad though since it's not the same thing as gorging yourself on food IMO. It sucks that the effort you put into your body starts to work against you at some point when you surpass your limits of what it was meant to handle.
Don't ever forget that if you're over 200lbs and not 6'7" or some such shit (don't know the exact definition), you're techically obese.
Rest in peace good sir.