This is a part of Finnish culture, IMO, wanting to be fair (which often means impartial) not just about disliking things but about everything. I call it "Fairness Kink". It's not really a kink obviously, it's just... a culturally validated preference. Finnish culture sets a very high value on justice and fairness and following rules & thus also on being INTERNALLY fair, even inside your own mind, which I think is probably a side-effect. It's an important skill of course, realizing that our perspective isn't the only one and that one's own preferences and opinions aren't universal truths or absolute standards. And that's mostly a good thing, but the habit of checking everything for fairness can result in striving to be impartial even about matters of taste.