Sorry to break this for you, but your digestive system is not that of a herbivore.

You don't have a multi-chamber stomach, you dont have a fully flattened dentition, you don't have a gap between you incisives and your molars to help with the grinding of vegetable fibers, you are not bringing your half-digested food from your stomach to your mouth to chew on it again, you lack several meters of intestines for processing leaf and other vegetable materials, and your gut microbiota is not adapted to process only vegetables. You have a digestive system designed to follow a omnivorous diet, everything in your body points towards that.

When you look throughout human evolution, brain size increases are highly correlated with an increase in animal protein consumption. Since protohumans abandoned a fruit based diet, with sporadic supplements of insects and other animal proteins, the animal content of the diet kept increasing right until ~10K years ago. Then, it quickly shifted to grain based diets. This shift has been so sudden that our bodies are not properly adapted to the high amounts of carbohydrates we consume nowadays. Artificial selection of high cabrs content plants, and a less active life have enhanced the detrimental effects this swift change has.

So, if you follow the millions of years of evolution your body tells, you should have a omnivorous diet with high levels of animal protein, supplemented vegetables, out of which only fruit should be high carbs.

If you don't want to follow that diet based on some cow hugging beliefs, fine. But don't bullshit yourself telling you that your body is something it isn't.