It is contradictory to claim belief in an authority, then claim authority for a belief not validated by the previously mentioned authority. We Catholics have demonstrated ad nauseum how Protestants are intellectually dishonest in this regard, yet adhere to their "Bible only" fraud with cult-like mindlessness.
And Catholics adhere to the magesterium mindlessly like a cult. Don’t you ever question your beliefs? Don’t you ever investigate for yourselves if something is true the way they’ve taught you? Talk about blindly following...