I think to help you with this, if it is still a question for you, we need to remember that the Church has always held that Scripture and Tradition were working hand in hand. In the first century scripture was for the most part just the old testament. Then there were instructional texts written to different churches and people. These texts SUPPLEMENTED the oral teaching that they had already received… Sometimes they were letters of encouragement, sometimes clarification, and other times correction. The people receiving the letters were already practicing Christianity without the New Testament.
Of course these letters from Apostles they received were highly treasured and read to the people often to emphasize the teachings from the Apostles. In time, they were considered Christian Scripture.
Things like the Didache could have been included, but just because it has sound teaching and was written in the first century does not make it “worthy” of being placed on the level of scripture. No doubt there were many Christian writings now lost to history that were in circulation.
I love the didache, I find it really cool and interesting. I kind of look at it like an instruction manual that was given to new priests or churches perhaps. So although valuable and informative was maybe a little “lack luster” compared to the writings of the Apostles.
Of course this is just speculation, really we cannot know for certain unless we were there in the councils in the early church debating such things.
As far as I know there is no writing about the background of the discussions from the early councils, so all we have is the final word. No doubt there was much discussion regarding it.
Have you read the protoevangelium of James yet.
I actually just read it, and it is a really cool document. Although there are some issues, it is undoubtedly old (second century perhaps) and really makes the whole virgin birth and Jesus’ siblings issue fall into place that makes complete sense!
When you find yourself defending Catholicism in your Mega Church, you are already half way across the Tiber. We have all been there done that!
After reading your other thread and reviewing our discussion on the Eucharist I wanted to share one more thing with you.
Father Barron has an excellent video on the Eucharist.
If you haven’t seen Father Barron yet, it is a must. His website is
wordonfire.org
On the Eucharist
youtube.com/watch?v=bJjW3LXuHzo