Well, you are right, right in regard to the affect of smoking onto non-smokers and obesity onto "non-obese" people.

What I meant is that smoking is a minority affair healthwise, while eating too much affects most people. Have you ever realised that they politely changed the scale. I still remember my visit for surgery in '88, when I felt (correctly) that I had overweight. I then laughingly was told that I by modern standards was just slightly above average and that most of my overweight was based on "heavy bones" or something thelike. What happened ? They, I mean the doctors in one of the organisations of the Council of Europe decided to change the criteria, and so, the criteria I had in mind no longer were relevant. And so, I am not "overweight" but just "slightly above average "