Variety is the key to dietary health, getting all the nutrients in a variety of their forms, such as the different forms of vitamin A for example, basically eating a wide variety of foods, truly a little bit of everything, but most people prefer the most simplistic approach possible so narrow diets easily reach fad hype status, keto fruitarian carnivore paleo etc and it also plays into identity psychology like oh I'm an lactovegetarian or I'm a raw vegan, high fat low carb or high carb low fat is just more stupid bs for people who have nothing better to do to feel they are improving themselves or their lives, a decent amount of all the macros is best but even that's just too complicated for a lot of people these days, even the concept of whole foods is fucking stupid, as though food somehow becomes unhealthy if it has been prepared by someone else or a machine, it's added chemicals people should be concerned about not food being whole vs processed, tomatoes are whole foods but are these covered in pesticides, because if so that frozen egg cheese burrito is probably the safer bet