Human beings are irrational creatures. This is why fake back surgery is also as successful as real ones. Or why cheap wine can taste as good as the expensive stuff when blindfolded. We can trick ourselves into believing anything. We can double think, believe in two contradicting/opposing views at the same time. Believe that Princess Diana died and is still alive today. We can read 99 5-star reviews about our work but get down about the one person who didn’t like it. We struggle as tensions build in a conversation–especially when the conversation is around us and things we can’t change. We can ignore science and believe in things we can’t see.
Humans are story-driven. We cherry-pick the information and plant it into a story we are already telling ourselves about the world. None of us are rational, regardless of whether we think we are the exception.