Agree, and I succeeded with that too, but for a shorter period. As a raw vegan my blood sugar was low, but I developed brain fog and intense cravings after about six months. I believe that path is sustainable for people with lower protein requirements and a healthier digestive system than mine.
Interestingly, as a pre-diabetic zero carber my blood sugar is excellent in as little as a week. Not meaning to make fun of your diet, just observing that what you ingest != what's in your blood stream, we are very complex chemical machines.
In this case a moderately high carb diet like yours results in low sugar, while a diet with <5g of carbs a day results in healthy sugar levels.
(The reason is insulin. Remove dietary carbs, you generate less insulin, so blood sugar flatlines, with gluconeogenesis to maintain the minimal levels to function, while the rest of the energy is provided by fatty acids)
A carrot, a cabbage, a bell pepper or a butternut squash will contain a significant amount of carbs, all of which is in the form of simple sugars (glucose, fructose and sucrose mainly) so they avoid those foods?
I believe that the common denominator is nearly zero sugar.