I don't buy that 100%. At some point you will get old and sick enough that you risk becoming a huge resource drain. It may sound heartless but I am saying it imagining myself in that position and saying no to millions of dollars in medical treatment for a few more months/years of misery and pulling the plug instead. The benefit for my kids/family would be huge.
Then look at it like this: the better you take care of yourself, the less likely you are to have a severely degraded quality of life before your luck (or health) runs out.
