@yo-its-me said
Yes you can feed your gut microbes with some veg.
Yes fermented foods are good, yes veggies and fruits have fiber.
I suspect your rethoric to protein is that animals eat the protein and you'll eat them, right?
Carbs don't cause diabetes, sorry I think you're about a decade out of the loop with that remark.
It's clear that generally people don't know enough about the ...[text shortened]... times. But we have no idea about the long term impact or what foods we're eating are making us ill.
Grains are not a source of protein. Grains are a source of carbs and your body converts carbs into sugars. If your body gets overloaded with sugars you become diabetic. Cancers feed on sugars as well. Only protein and fats are essential for your body. Grains are mainly carbs that get converted to sugar.
It is obvious to me that you do not actually know anything on this topic. All you can do is repeat advice you have been given without actual info on the subject.
If you want protein from a vegetarian diet look to legumes and nuts.
Give me specific nutrients or other nutritional benefits that only grains can provide. Please do not simply repeat unsubstantiated claims that grains are generally good for you.
If you have no issues with blood sugars and you could not stand to lose a few pounds, then grains are fine. I believe the right number for your a1c is something like 5.6 at max.
If you are needing to watch your blood sugars then a great place to start is to eliminate grains.