Can you justify that tradition ought to contain knowledge? Folk medicine has a very crude optimizing drift - do it wrong and the patient dies, and some cures can be obvious. I don't see even that in religion. For what reason ought it to produce better results than noise?
You are doubing there are things of value in religions? Many religions contain things which have proved to be valuable in modern times. Consider Hinduism and Hatha Yoga, for example. Civilisation didn't get Hatha Yoga because science rediscovered it - it got it from the Hindu religious tradition.
BHTV episode with myself and Adam Frank, author of "The Constant Fire", on whether or not religious experience is compatible with the scientific experience, or worth trying to salvage.