But each person can still decide what they want to believe, in spite of your "facts".
Absolutely! You are free to disregard any physical evidence you like. Just don't demand that everybody else must disregard it.
> each person can still decide what they want to believe
Indeed. People can indeed choose to believe in utter superstitious rubbish. And in a way, that's for the best. We need stratification in society. While some will choose to discover facts and will go to the stars, some will choose to disbelieve facts, and will serve a useful role scrubbing toilets and sweeping the streets, and wondering why it is that their prayers aren't curing their diseases.