The words and systems we use to arrange our mind and analyze things can be wrong. Our conclusions can still be right.
Because much information can be arranged under headlines that are not exact and still be useful.
Religious people term much of their knowledge in religion related terms. "do so and so and god will help". A naive observer will think that the advice depends on beleif in god, but in reality it maybe entirely independent. He thinks this is the right thing to do, and thinks there is good chance for success. God here may mean luck.
Generally, knowledge can be stored, arranged and presented in many ways. Knowledge can be real and useful, even if its format seems fictitious and unreal.
Learn to distinguish essense from form and content form the way it is presented with.