Modernity and modern "protestants" have abandoned metaphysics. As a Protestant myself, I am ashamed to admit that if the RCC were to concede to the demands of the early reformers, today, the "protestant" churches would find some other reason not to submit to the church's authority. The reason being is that individualism and a general attitude of hubris towards tradition and authority has overcome the majority of Protestantism.
I think a prime example of this is the ... Protestant reaction towards the Humanae Vitae. It's a great work on marriage. I think it's to one's discredit if they read it, read of the truths it talks about, and then turn their backs on it because it's "Roman Catholic." That is evidence of intellectual stubbornness and a resistance to truth.
Frank wrote: If you attend or defend the Catholic church, you are guilty of the above.