I think it is also due to societal pressures (in the US at least) because we are obsessed with never being wrong, never claiming fault, always trying to show off, and never show compassion because it is weakness. So we have to fall back on believing something instead of knowing, testing, and verifying something. Everything has to be a conspiracy "theory" because they hold no understanding that a theory must be tested and really they're obsessed with hypotheses they can't prove nor accept they lack evidence for.