Data beats no data 98% of the time, but sometimes even solid data will not dent a person’s view of reality. Even more frustrating are the frequent situations where two individuals look at the same data and draw opposite conclusions!
We don’t like to be wrong. We don’t want to hear information that would clearly make us wrong. We like our echo chambers and our interpretation of “facts” which support our preciously-held worldview. Everyone will readily acknowledge mistakes were made; it’s considerably easier to acknowledge the mistakes of others rather than ourselves. Changing people’s minds is incredibly difficult.