Lung cancer is just the tip of the iceberg. Smoking dramatically increases risks for a great many kinds of cancer, including breast, prostate and colon, dramatically increases the risks of heart disease, dramatically increases the risks of diabetes and stroke, etc. These aren't tenuous or hypothetical links, these are huge, clinically proven, scientifically inarguable risk factors that dwarf just about everything else that you can do to yourself to get you sick.
Once again, a lot of people are predisposed to having been born with the cancer gene.
If a person is active and eats healthy, smoking isn't going to make them sicker then your fat couch potato. How do you account for smokers living well into their 80's and 90's?
I was a professional dancer for many years and I smoked. Smoking never shortened my breath and I could dance all night. I was in great physical shape and smoking was never an issue in my life.
I never smoked 4 packs a day, either. Moderation is the key to everything we do in life.
If smoking dramatically increases the risk of breast cancer, why don't they list it on risk assessment?