You wrote:
“Hmm, “the Church” was what between let’s say 9800BC and 600AD?”
The Church was since its founding one, holy, catholic and apostolic. It is so great in its gifts it teaches even the angels about the manifest wisdom of God.
“Whatever they “taught” no one was listening (for the most part).”
The angels listened. Those who wanted to know the truth listened.
The point I'm making is that for MOST (80% or more) of human history since the Ice Age retreat the standards were not set in Rome!