While no given papal teaching that does not meet the notes of infallibility defined at Vatican I is absolutely guaranteed to be free from error
a substantial body of papal teaching cannot be in error. It's actually what you clowns keep calling "Tradition", and which is why we can rely on the teachings of Pius IX, Gregory XVI, St. Pius X that were not strictly infallible to be generally reliable. It's due to the Holy Ghost protection over the papal Magisterium, which +Lefebvre affirmed and which you bad-willed idiots refuse to address...
If there's anything worse than heresy, it's heresy combined with sheer stupdity.
So says you, but not the Church.
What is to stop a bad Pope teaching in the Ordinary Magisterium against Tradition, against the infallible Magisterium of the past?
We already knew from the infallible magisterium that the novelties of Vatican II were contrary to Catholic teaching (whether from the extraordinary or infallible ordinary magisterium) and so our good Archbishop Lefebvre withstood the Pope to his face. Nothing becomes part of Tradition by contradicting Tradition.
And that is why Cardinal Franzelin in stating that the present consensus of the Church/the unanimous preaching of the Church/a universal present consensus alone suffices of itself, explains that this is a
means of knowing absolute antiquity, "by either of these means absolute antiquity can be known", and immediately qualifies what he says by stating "but if, through the arising of a controversy, this consensus were to become less apparent, or were not acknowledged by the adversaries to be confuted, then - says St Vincent - appeal must be made to
the manifest consensus of antiquity, or to solemn judgements, or to the consentient convictions of the Fathers". Apply that to Vatican II and you will arrive at the same understanding of the infallibility of Vatican II and the post Vatican II magisterium as Archbishop Lefebvre. What a great theologian he truly was, what a marvelous man of the Church God gave us.
We see here that Cardinal Franzelin believed that ultimately universality, as he explains St Vincent's understanding of that term, is not to be considered apart from antiquity, and so to arrive at a conclusion that the present day ordinary magisterium is infallible, it can in no way contradict the magisterium of the past.
Your idea here of how the Holy Ghost protects the papal magisterium is clearly erroneous and exaggerated.
It's just another example of someone being shocked by the magnitude of what has happened and throwing up his hands and saying, it's not possible, it's never happened before, he can't be Pope.
Thanks to QVD for providing the reference to Cardinal Franzelin's thesis which confirms this understanding of the infallible magisterium:
https://novusordowatch.org/wp-content/uploads/franzelin-vincentian-canon.pdf
(see bottom p 168, top of p169)