Well, I think it's easy to make such a judgement from the cheap seats. Hopefully you'll never be in the situation I found myself in; it's not quite as easy to just "find a quick way to end it once the pain starts getting out of control and the quality of life is gone." And my two daughters are happy I'm around 4 years later to celebrate Father's Day. I'm a diehard conservative, but I think that how a nation treats the ill and infirm says a lot about the character of its people.
By your logic, you wouldn't be carrying auto insurance, renter/homeowner's insurance either? As I originally responded, you're gravely confusing the true role of insurance. It's not to make one whole in a crisis, it's to ameliorate some of the worst case scenarios. Since you seem to be fond of investing, think of it as an option or derivative to offload some of your risk.
And you seriously quoted Malthus? Why don't you dig up Paul Ehrlich as well? That entire ZPG train of inquiry has long since been disproved.