The idea that pineapple clashes with pizza is a common misconception, but it's based on a narrow understanding of flavor pairing. While it's true that sweetness and saltiness can sometimes conflict, the same principle applies to many classic combinations like sweet and savory sauces or even bacon and maple syrup. The key is context and balance—pineapple adds a bright, tropical contrast that can elevate a pizza, especially when paired with complementary ingredients like mozzarella or herbs. It's not about forced harmony but about creating a memorable, enjoyable experience.

You're right that taste is subjective, and that's where the debate gets interesting. The claim that pineapple "belongs" on pizza isn't about being universally correct, but about being a valid, culturally significant choice. Just because a pairing isn't traditional doesn't mean it's invalid. Many cuisines have evolved through experimentation, and pizza is no exception. The study you cite acknowledges personal taste, which aligns with the idea that the claim is "mostly true" because it reflects a legitimate, if controversial, culinary choice.