We are agreed that the Bible is God-breathed Scripture. I simply propose that Tradition, via the intervention of the Holy Spirit, had to have a hand in assembling the texts from the numerous sources available at the time. Why were some in, and some out? Why do the Catholics use the Septuagint (the text available to Christ himself, BTW), while the Protestants use the translation of the 17th c. Hebrew canon?
Internal self-validation is inadequate when a work is not produced by the same hand at the same time.
Tradition does not equal God's word.
End of discussion