It's sad that such a great American artist, (and super nice guy by all accounts), is gone but it's important to remember that when I was a kid 50 years ago, a lot of people smoked and ate bacon every day, were 50 lbs. overweight, etc. and people died of old age @ 65.
Not judging Tom at all, (especially since I smoked for ages), but he lived how he wanted to and knew that he risked not seeing old age. One of my dad's best friends once said,
"If you're lucky, you die of a heart attack. If you're not lucky, it's cancer." 