Yeah, strangely enough, food and its accompanying culture is one of the most prevalent socially acceptable, encouraged biases. There's no objective, empirical stance you can take. Well, sure you can value food based on its nutritional content, but food and health science is continuously flipping back and forth on the facts and is overrun with pop-science, stirring confusing to no end. But most of all, your brain doesn't care about nutritional value once something is in your mouth.

"I don't like onions." "Oh, how can that be?" "Well, uh, they taste bad, I avoid them." "Well, I think they're great [because I like them]."

And yet these kinds of worthless opinions are given credence to no end in all levels of discourse from casual small talk to high-class cuisine.