That's because they refuse to understand economics. Not that they don't understand, but they actively refuse.

You show them this, show them they were wrong. They'll scratch their heads. You then explain to them why this happened, do you think they're going to update their mental model of how things work? No, because they don't want to believe your reasoning. They'll be making predictions based on their old model tomorrow, be wrong again, still pretending this is some unexplainable strange quirk and not a failing of their model about how the world works, not updating their model. There's nothing scientific about how they approach understanding the world.