We rely on two principle authorities: The Magisterium that you reject and that the interpretation is supported by practices of Christians since the early Church (Apostles and their immediate successors).
Catholics do not belong to the “Church of Sandusky.” I know that has a bite of sarcasm and no offense is intended. However, because you are the source of your own authority, we find it imprudent to throw out 2,000 years of teaching and practice on the word of single person.
How do you know that they’re right?
By the same authority that I accept the Bible as the Word of God. They came from the same eternal source via the same temporal source.
Like Teflon said in another thread, “the problem is they can’t square a circle” no matter how hard they try.
The facts of where we got scripture
In the beginning, there was no single source of Scripture. Each individual Church only had bits and pieces of the whole. The Corinthians had their letters and possibly all or parts of one or more of the Gospels. So it was with the Thessalonians, etc. The partial Scripture in each locale was guarded (lest civil authorities find it and destroy it) with great zeal by each Church and only read to the faithful at Mass.
Overtime, faithful monks and Priests copied the Scripture for distribution and exchange with other churches. As all Churches under the Apostolic See in Rome came into possession of them a loose Canon was available for the Scripture readings at Mass and Scripture was more broadly available.
By virtue of this process of reading Scripture in the Masses, guided by the Holy Spirit as was the original authors, errant texts and letters fell into disuse and ultimately lost (except for a few limited texts that have been found over time).
In the 3rd century, the Church Magisterium (all Bishops), under authority of the Pope, came together in two councils and formally canonized what we now know as the Bible.
In short, the Mass preceeded Scripture. Mass was used as both the place for the proclammation of Scripture but also acted as the editor of errant, non-inspired writings. The movement throught Christendom of Bishops and their deputies was how the inspired texts were distributed. And, finally it was the Magisterium that came together to canonize the Bible.
For Sandusky to cast doubt to the early Church fathers, bishops and magisteriums with regard to the interpretation of this verse also casts a cloud on the very Bible she relies upon.
When I accept both the Bible and the interpretation of the early Church fathers (an interpretation the Church still holds today) regarding this text, I am wholly consistent. When Sandusky makes selective private revelation of what the early Church Fathers did, practiced and taught, Sandusky is arbitrarily inconsistent.