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Amylase present in the saliva in addition to being excreted by the pancreas into the small intestines suggest we've evolved to maximize the amount of energy extracted from starch. Calories from fruits are mostly simple sugars and vegetables don't contain that many calories.
Grains such as rice and wheat have been cultivated as a staple of the human diet for over 10,000 years (this number is larger than a few hundred) and it's probably the case that before neolithic times humans gathered wild specimens for food.
Those grain based foods you mentioned are excellent examples of foods one should limit, Would you say the same for wheat bran? Whole wheat pasta? Brown rice? Rolled oats?
So again, I ask what you believe the make up should be. To me, it looks like you're recommending a majority of your calories come from protein and fat. I am not arguing that that would be wrong. In the Inuit diet, 75% of their calories come from fat.
I'll make my position clear. I only would say that your position that more than 2-3 servings of grains is consider too much is wrong. However, I make no suggestion as to what is optimal.
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