(I'm a heavy smoker and serial quitter, on my 5th attempt. 7 months so far.)
Have you ever watch someone you love die by lung cancer? Anticipated his approaching death even when he / she is somewhat healthy?
I'm sure there are worse, but this is not a peaceful process. You don't get a sudden call saying, "Lost the dad. Yes dear, heart attack", bury him the next day and deal with the memories. This is pure "He's skinny, in pain, dying. And we're powerless to even ease his pain" stuff. Give the family a break.
And no one needs your money for roads, education, utilities coming from tobacco tax. You'll cost much more when you're dying.