They hadn’t read scripture?
“and his name shall be called Wonderful, Counsellor, The mighty God, The everlasting Father, The Prince of Peace”
“and the word was with God and the word was God”.
“and the word became flesh”
How many more should I list? Maybe they were to concentrated on developing their traditions of man? People who put their faith in the RCC really need to "come out of her".
Please read the above passage ... again. The Bible, as you know it, did not exist in 325 AD. There were many, many gospels, documents and letters. Which ones were authoritative? None of them had yet been compiled into a book.