Indeed it is, and thus this is ultimately the recourse of RCs when attempts to establish defend doctrines upon Scripture, and arguments from silence, which really are based upon tradition, fail.
Sometimes at the outset the "Catholic church gave you the Bible, it has the authority to say what it means" polemical assertion is used.
And which premise is also basically defended upon the presuppositions that an assuredly (if conditionally) infallible magisterium is essential for determination and assurance of Truth (including writings and men being of God) .
And to fulfill promises of Divine presence, providence of Truth, and preservation of faith, and authority. (Jn. 14:16,26; 15:26; 16:13; Mt. 16:18; Lk. 10:16, etc.)
And that being the historical instruments and stewards of Divine revelation (oral and written) means that such is that assuredly infallible magisterium. Thus those who dissent from the latter are in rebellion to God.
What here can a RC disagree with?
To Catholics the OT Deuterocanon is Scripture. To us, Martin Luther was the person who got people to stop regarding them as Scripture. I do know that he did not throw them in the garbage.
Actually, Luther did not have an infallible indisputable canon to dispute from, nor was he alone in doing so, but doubt and disagreement continued down thru the centuries about books and right into Trent. See here .
Something that other Catholics have done on this thread is whine about how they are treated. I do not believe Jesus died on the Cross so people in the 21st century could whine and run to mommy about how they are treated on the internet.
Well, that makes you an exception, but RCs not only post the most about their church here by far, but they can go so far as saying that there is not and never has been a bit of anti-Protestant bigotry on FR, or that they never see threads of Catholics starting an argument with protestants on FR. Even though they do so!
But with over 800 posts in two day then this one certainly has seen the most responses due to RCs trying to defend a tradition of men which has a special psychological content. I dare say a post attacking the deity of Christ or the whole Trinity would see half the responses by RCs.
....”RCs trying to defend a tradition of men which has a special psychological content”.....
Yes, and generally speaking the more they try to defend it so the more the ball of thread tightens.
However we do see Roman Catholics post on threads where Christians defend the Trinity and Deity of Christ doctrines. They come on and state to the opposing view "no you can't find these doctrines in the Bible but need the councils for answers" thus bolstering the position of the Trinity and Deity deniers and then leave the thread.