Hi. As some others have said, your comments about reducing HBa1c being successful with a High Carb diet are not supported by the greater majority of posters and I don't agree with your comment; also why mention calories as most posters will talk about the three main food groups rather than 'calories'
I understand many people here have experience with low carb, even I have had blood sugar and other markers improved. I don't deny it neither I am saying that high carb would work for everyone. But my experience with low carb/high fat/high protien wasn't that great either.
I dropped so much weight that i nearly disappeared even when i was eating food amount of protien and fat. I was loosing muscle which is not good. I got some problem with pains in neck during exertions which was scary. I had to get checked with various cardiologist. It has resolved since going vegan/vegetarian.
Another reason is that in high fat diet sugars will always be consistent, but as soon as carbs are eaten my body would never handle it well.
I should clarify here that by high carb i don't mean eating flours, rice and potatoes. I myself eat beans, lentils, some low GI fruits, lots of green veggies and nuts and some yogurt sometimes.
I don't add oil in cooking and even on high carb diet I do IF.
Why I post about calories is because calories matter. Even on high fat diet you would do great till you don't gain weight. If you start gaining weight you blood sugars will creep up. Please look into this if you think calories doesn't matter.
High fat diet mask insulin resistance because you don't eat any carbs to show if you are still resistant or reversed. We develop diabetes or insulin resistance when we eat more then our body can store. Excess carbs convert to fat that's why high carb is shown as a problem, but when we eat fat we directly store fat and have more free fats flowing around.
Anyway i am still researching and others as well. Noone knows what is exact mechanism which cause diabetes and how to reverse it truly. I just wanted to share my experience with OP.