I think that truth itself is the issue. Faith based belief is so desperate to validate itself as true that it abuses what truth is. You often see it from posters making a religious assertion when they claim something as the 'TRUTH' - trying to state a rigid absolute knowledge marker - when what they are actually saying is 'this is what I perceive to be true'. I can understand someone wearing blue glasses declaring that to them the world is blue because it really is for them. Declaring that the world's perceived blueness is the absolute 'TRUTH' and that anyone, especially those no longer wearing blue glasses, to be suffering faulty vision if they don't see it is the fundamental weakness. I don't doubt that some of our more consistent voice hearers or messiahs really do see/hear/perceive reality as described. Heck some may indeed swear blind they are being visited by yak haired ,leprous gargoyles with special messages for an ancient tribe represented oddly enough here on this forum and to them they may well see, hear and converse with such a being. It's not true in an objective sense but subjectively may well be.
What we lack in our schooling and culture is proper training in skepticism, especially self skepticism and the ability to weight evidences derived from perception. If we start with an assumption based in myth or magic and then practice that assumption for long enough we start to only see or give credence to evidence that matches our desired view. Scienctific enquiry can start in a similar way (someone passionately believes they have an explanation for some phenomenon) but it has inbuilt checks like constructing tests, recording results, peer review, analytical procedures and so forth.
Sadly it takes a crisis ( accumulated over many years of niggles or a full blown slap in the face) to finally admit that we can sometimes simply be mistaken. Loud assertions by vocal preachers are no substitute for methodical scientific scrutiny.