I wasn't lucky enough to get lung cancer (which has a reasonable survivability rate). I got pancreatic cancer, which has a 96% kill rate in the first 18 months following initial diagnosis. I'm now 7 months past having 2/3rds of my pancreas, spleen and gall bladder removed as well as having a collapsed lung due to complications of pneumonia.
Now think long and hard about this question: do you really think I want to return to using the very thing that made all that possible?
One of my relatives got the cancer of the throat and he did NOT smoke. If he did everyone would be convinced that smoking was the cause. On the other hand, another member of my family (with whom I share the genes) has Parkinson. Smoking without inhaling might be a good risk for me.