If Rome cannot affirm the authority of Scripture apart from the caveat that tradition is necessary to explain the Bible's true meaning, let them explain how that does NOT make tradition a superior authority to Scripture.
Since Rome claims infallibility for itself, let them explain how that doesn't make the Scriptures ultimately irrelevant.
Sorry --
Been away for a while. Indeed, the Catholic doctrine of the superiority of tradition DOES make the scriptures irrelevant. I suppose that is one of the reasons they are instructed (generally) to not read the Bible for themselves.