Earlier quoted context omitted.
Well nutrition isn't exactly a settled science. There are many problems with studies and as a result we have a wide variety of sometimes contradictory conclusions from them. New conclusions and findings come out but the nutrition community is unable to achieve a consensus understanding on these types of aspects of a diet. There are too many confounding factors involved in studies and it is nearly impossible to design…
There is now enough evidence that there is a good amount of consensus among nutrition researchers: https://wfpb-wolf.netlify.com/consensus.html https://wfpb-wolf.netlify.com/scientific_studies.html
Vegetables - way too broad a category. Should be split into leaves, stalks, roots, starches, seeds, alliums, brassicaceae, legumes etc. Calling it all "vegetables" makes it hard for people to rank, prioritize, and proportion which are a better use of time, money, and energy to consume. There might be consensus on eating "vegetables" but not necessarily every group of them. Nutritional density is more complicated than "vegetables."
Whole grains - Antithesis to previous point, grains are not categorized as vegetables. Why are whole grains their own recommended category everywhere as a staple part of diets? Is it cost? Industry lobbying? Diet recommendation should focus on leaves and seeds, with cereals as a filler. Cereal portion should be the one controlled to control weight gain, moreso than plant fat from seeds/nuts. We've gotten too comfortable with a huge serving of rice or potatoes with something thrown on top.
Red meat - carcinogens appear to come from preparation methods (browning, curing) and can be mitigated by vegetable intake. https://examine.com/nutrition/does-red-meat-cause-cancer/
Fruit - mostly as not necessary to a healthy diet as this makes it look like. Can be avoided the same way meat is.
Fish (salmon & sardines) and Seafood (mussels) belongs in the consensus part over fruit.
Doesn't touch on fermented food.
The jury is more out on saturated fat and dietary cholesterol than these government bodies want to admit.
Its hard to reverse course quickly and say "everything we said for the last 30 years is wrong."
Almost none of the diet suggestions focus on digestion, absorption.
I just dont see consensus on what percent of a diet should be grain vs vegetable, starches, legumes, fats, meats. Maybe it doesnt matter. "WFPB is the healthiest diet" is very different from "WFPB is one of the healthiest diets."