I think God can protect Himself just fine. He did OK with the Old Testament. And amigo, the Church Fathers were all over the board, and the ‘Fathers’ acknowledged scripture - they did not determine it.
Had it not been for God guiding the Church fathers, you would be reading the Gospel of Thomas in the morning.
Implicit in all non-Catholic doctrine, or the vast majority of it, is the basic belief that no, God didn't do just fine with the Old Testament. Either the Septuagint erroneously included books that should not have been a part of the canon but were included in the canon right up until Luther, or everyone who has come along since Luther has discarded legitimate portions of the Scriptures. So if you're non-Catholic, then you by definition do NOT believe that God "did OK with the Old Testament".
So, was the Septauigent in error but both Christ and the Apostles didn't bother to mention the fact that the most common version of the Scriptures in use was incorrect or did Christ and the Apostles a) not think what was or was not a part of the canon was important, or b) agree that what was included in the Septuagint was all a valid and inspired portion of His Word?
Christ and the Apostles obviously, "acknowledged" Scripture that non-Catholics have determined they shouldn't have. Hopefully those who do the "acknowledging" on behalf of non-Catholics have set Christ straight by pointing out to Him that although He is the Word, He didn't acknowledge errors in The Word that was in common use while He walked the earth. I guess after a good talking to from Luther Christ will know not to make that same mistake again, right?
*****the Church Fathers were all over the board,*****
Which is precisely why there is a need for the Church which is guided and protected by the Holy Spirit.
The Fathers of the Church were not infallibly authorities but they are cited because they wrote on the early theologies about Jesus. They show that the truths that the Church eventually declared and declares as TRUTH were not inventions, but were commonly held beliefs. The Fathers looked to Scripture and tradition to support their theology, exactly as the Church does.
The fact that they were “all over the board” underscores and illumines the absolute need for an authority, an authority that is not private interpretation or prophecy.