Most of what you cost the state will be in the last years of your life, whatever you die of. Has anyone actually worked out whether you cost the state more if you 1) die of some smoking related disease in your 50s or 2) live to 95 and spend your last 20 years dribbling down your front, burbling incoherently while you wait for the nurse to change your nappy, or 3) get shovelled up off the road or rugby pitch in your 20s and go straight to 2) for the next 70 years.
I’ve never seen a comparison, I suspect it would be interesting reading, especially if you factor in the taxes.
FWIW I gave up years ago. I don’t like it particularly, but there are a lot of things I don’t like, that’s the way life is, get used to it, it’s too short to get self righteous about other people’s habits.