Because those differences are a reflection in differences of understanding, not of how the underlying system being studied actually works. Whether or not you sa

Because those differences are a reflection in differences of understanding, not of how the underlying system being studied actually works. Whether or not you say that the sky being blue is because of light and the composition of the atmosphere and the current weather, or because the Sky God made it that way has nothing to do with the actual reason why. It's solely a reflection of your explanation. It is how it is for a reason, and that reason doesn't change because your explanation does.