Science fiction said cigarettes would be self igniting. why are they self extinguishing?

So many things that were science fiction have become science fact, ie: small shiny discs that can play music and movies, little kindle type books, Tracy two way wrist radios, robot companions, the list goes on and on. When these visionary authors concieved all of these things, how could they have been so wrong about cigarettes? Don't tell me it's because of the health risks either.