I'm not sure if anyone has made this point as to why smoking isn't selfish as I skipped ahead.
But, actuarialy smoking is a very positive choice and smokers will get lower pension contributions as they will be expected to live for less time whilst claiming their pension.
They also act as net economic contributors on the whole as in addition to the massive amounts they pay in additional tax, they need less care after retirement and do the decent thing and peg out fairly quickly, thereby leaving their children more inheritance as it hasn't been spent on nursing homes. For those without funds (as it's all been spent on fags and lollygagging), there is less recourse to government funding, as they'll be nice and dead.
Smoking has also been shown to lower dementia rates, so not only do smokers die sooner, but they tend to be cognisant up until death.
Smokers largely confer a net benefit to non-smokers. Plus non-smokers also get to whinge about smokers and feel morally superior whilst reaping the financial benefits.
Plus, smokers tend to look older thereby making you feel like a glowing-cheeked youth in the prime of your life in comparison.
What's not to fucking like?