My point was merely to point out that it is folly, and pointless, for a doctor to make a statement attributing a cancer in an individual to an absolute cause. There may be a limited number of cases where the absolute statement can be made but I don't believe that the absolute serves any purpose other than to reinforce the guilt feelings a smoker, drinker etc. may have due to the negative stigma of their behaviour.

At any rate this topic probably doesn't warrant a long discussion and I understand and respect your view so end of discussion for me.