>>>>The factors you mention with regard to diabetes are far less simple to understand. I'm sure that people in the future will not think of us as foolish people. :)
>>
>>Yeah, I got way too detailed.
>>It is pretty much as simple as the cigarette thing, and cigarettes=cancer took decades to become conventional wisdom.
>>
>>Cigarettes = Poison the lungs = Cancer (in many but not all people)
>>
>>High Carb Diet = Overworked Pancreas = Diabetes (in many but not all people)
>
>I can distinguish a cigarette from anything else, but I can't obviously see the Carb in the food. That's why it's not comparable.

That assumes that visibility is the criteria by which the difference must be judged rather than knowledge.