It's not about quality. I'm saying that, if someone doesn't like black olives, Mister FancyPants Chef had better not put black olives on their food, regardless what his culinary arts degree claims. Aside from merely chemical variations such as the people who spit out cilantro in disgust, food has a deeply personal, emotional aspect. No matter what the "right" combination of flavors is for the people who created a recipe, it cannot be extended to all people. The job of the Chef is to please his customer, not to justify his own preferences by forcing them on others.
I doubt any successful chef thinks this way, at any rate. It's mostly an idea put forth by dumbasses who want to show their "respect" to cooking school. Imagine if someone were to tell you, no, your spotify playlist is wrong. You need to listen to more Beatles because people like the Beatles and that's that.