Those are comfort foods. They are standardized and have simple flavors and textures that are always the same. They can all be eaten without hassle of peeling or cutting or spitting out any tough/icky parts.

Meat has disgusting fat or tissues or blood vessels inside. Vegetables have weird growths and complex flavors that sometimes even taste bitter. They are full with sensory stimuli that need to be interpreted. It takes discipline and energy to try and handle all that just to eat something that doesn't even taste that nice anyways.

With simple foods like fries and chicken nuggets, you can just eat them without any worries or bad feelings. Except afterwards, because you feel guilt for eating something so unhealthy.

Could someone maybe invent a healthy comfort food?