Once you get a deeper understanding of how human evolution works, John Cleese’s (actor, comedian, and creator of Fawlty Towers and Monty Python) quote comes into focus:
“Nobody really knows what they are talking about” — John Cleese
So, don’t believe anything, find things out for yourself, as I do, and you’ll believe even less in the make-believe others get indoctrinated by. Humanity is prone to prolonged hallucinations that find their way into the many manmade systems of humanity, without any correlation to reality.
So, not believing in hallucinations makes you sane. A trait needed to think for yourself and question and improve the manmade systems that hold humanity hostage.