I think the poster was listing different diets and advice, and not implying the first 3 include grains.
The point seemed to be that’s it’s confusing to identify an optimal or health- oriented diet. It’s interesting reading the different approaches on this thread. Some things not mentioned:
Too much linoleic acid, an omega-6 in plant-based seed oils is VERY unhealthy.
Sunshine is good. If you’ve gotten seed oils out of your standard diet sun burns are rare.
My nutritionalist advised 120g of protein a day, saying protein digestion is less efficient for people over 60-70. I require 2400+ calories per day, so that’s 20% of calories.
Occasional fasting or at least the Fasting Mimicking Diet is healthy, giving the body an opportunity to cleanse itself through apoptosis and autophagy.