While we definitely require protein and fat, the human requirement for dietary carbohydrate is none, none whatsoever.
What is the ideal diet for optimal brain function?
The brain thrives on a fat-rich low-carbohydrate diet, which unfortunately, is relatively uncommon in human populations today.
Do “good carbs” set off insulin and/or increase blood pressure? Is there anything bad about them?
All carbohydrates ultimately activate insulin to some degree. It is difficult to get a clear understanding of what may actually constitute a “good” carb.