Protestants may rely on it, but have very little understanding of it, and that what is constantly demonstrated.
Um....I believe we're the ones that are often found quoting from scriptures. Catholics, OTOH, often say "Saint Blah-blah believed [fill in the blank] and 8 out of 10 Catholics agreed with Saint Blah-blah's view. After all, Saint Blah-blah must be right because he didn't eat meat on Fridays AND on Tuesdays. He was such a holy man."