Up until the 1850s sugar was almost unheard of for the masses anywhere in the world.
Anyone can chalk up surge in diabetes, heart disease, and cancer to anything they want. Me I think the evidence is crystal clear. And I am walking the walk. Carbs almost all from non startchy veggies, no grains, little to no added sugar, more saturated fat.
I have the best health of my life, by far, at 48.
My beloved uncle got diabetes and dementia and followed standard dietary advice his whole life. It is devastating to me.