Yes I used to think that but it turns out that it’s the oils that are the main problem.
When people go low carb I believe their health improves because carbs and seed oils are very often combined in “foods” ie French fries, potato chips , even bread and almost all processed foods. When you reduce carbs , seed oil consumption is also massively reduced.
“A popular test used for evaluating diabetes is the measurement of glycated hemoglobin, the attachment of a sugar-like fragment to the protein of hemoglobin. This is used to judge whether blood sugar is being controlled adequately. The glycation of proteins is widely believed to be a central process in aging, and is often used to argue that people should reduce their sugar consumption.
But the changes in proteins that occur in diabetes are mainly produced by the breakdown products of polyunsaturated fatty acids.”
Ray Peat