“Did you miss the letter from Irenaeus I posted above?”
I saw it, whatever significance it has exists in your mind. Did you miss the obvious logical problem there is when asserting that quotes from the New Testament were actually from an oral tradition, and not from the scripture wherein they appear? Did the Apostle John memorize the epistles of Peter and Paul, and the Gospels of Matthew, Mark and Luke, so as to pass it on to Polycarp verbally who quoted them from this same “memory” instead of from the actual text?
What you reference are not complete texts but small 'snippets'. Some come from the sermon on the mount, recorded in more than one gospel. "to lead us not into temptation" ... the prayer Jesus taught the disciples. These are nothing more than fragments communicated orally from one disciple to another. There were no "books", nor were there any printing presses. The faith was transmitted by word of mouth. Your references support it.