Jesus’ words show the traditions he condemned were those that contravened God's word but that seems a distinction lost upon those like the author.
The New Testament writers recognized that their writing were part of Scripture so Paul's description of “all scripture” would include all the New Testament canon. (1 Peter 3:15-16)
Hence to support the unbiblical doctrines it teaches the Catholic Church must turn to traditions and extra-biblical sources and make the claim that it is responsible for setting the Bible canon.
“The New Testament writers recognized that their writing were part of Scripture so Paul’s description of “all scripture” would include all the New Testament canon.”
1 Peter 3:15-6
“But in your hearts set apart Christ as Lord. Always be prepared to give an answer to everyone who asks you to give the reason for the hope that you have. But do this with gentleness and respect, 16keeping a clear conscience, so that those who speak maliciously against your good behavior in Christ may be ashamed of their slander.”
I was expecting proof text, not an admonition.
I don’t know how I can make it any clearer. Peter, Paul, and the synoptics had no concept of a ‘canon’, per se. John wasn’t even written until 30 years after all the rest. The only one who would have any concept of a canon would be John, not the other synoptics, and particularly not Peter or Paul, as none of the synoptics had been written when the epistles were written.
The Canon was not set until St. Jerome did so with the Vulgate. While it is true that the NT was written in the original books, in Greek and Aramaic, it’s also true that the first time they were put together in a bible is in the Vulgate, and that was several hundred years after they were written. Until then, the NT canon had regional variations.