I must vehemently disagree.
After I navigated my health hell and healed, I now enjoy a rounded diet which includes all manner of healthful carbs. That pattern has persisted now for over 10 years.
(note the key word, coupled with 'after healed')
My understanding is, you can either eat a high carb/low fat diet, or a low carb/high fat diet. What you cannot do, and sadly what most do, is a high fat/high carb diet.
In a way it makes sense, because back in early days, your diet was dictated by where you live. In some places only foods high in carbs were available with little availability of animal-based proteins, and other places where animal-protein was available but vegetation, especially in winter months wasn’t available.