Obesity isn't the problem. Metabolic syndrome is the problem. Dr Lustig shows how fructose causes metabolic syndrome in his video Sugar The Bitter Truth.
Fruit is okay as it contains fibre. Sumo Wrestlers eat a lot of Chankonabe (a healthy stew filled with rice, noodles, chicken thighs, tofu, and vegetables). There is no processed fructose in that meal for a start.
And they also are doing exercise as well. In short, Sumo wrestlers don't get diabetes. Sugar: The Bitter Truth: https://www.youtube.com/watch?v=dBnniua6... Fat Chance: Fructose 2.0: https://www.youtube.com/watch?v=ceFyF9px...
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