@higashikata pretty much, it's more important to eat various kinds of foods, not just the food pyramid
you need all kinds of nutrients, the body is built to digest, you gotta let it eat anything and everything, it's always worth trying something new because you never know what you're lacking (eg. americans don't get much iodine because their diet consist mostly of land foods, whereas seafood is high in that, and thus need it in their salts)
carbs are only useful for holding water, and honestly makes you fatter; it's useful to have enough of it so you don't need to drink/piss often but generally worthless outside the desert
proteins are the most expensive and most useful, healthiest option available, even plant proteins being shitty doesn't remove its value
also both of the reasons above are why vegans are retarded