We all have implicit beliefs, which we cling to without even thinking about. Well, that is why they are implicit, rather than explicit. For most part, implicit beliefs are good: they reduce the mental load of questioning everything and allow us to go along with our lives.
To break those implicit beliefs is hard, and requires sound proof. We salute those who can show our implicit beliefs to be wrong.
Before Einstein, there was implicit belief that the interval of time is independent of frame of reference. No one talked about it, because no one thought about it. It was just true. It required Einstein to break that belief.