“The bigger issue is the authority by which Canon was established and the Protestant necessity to undermine that Catholic authority.”
Remember - the reason the Council of Trent addressed the canon was because no previous Council had done so authoritatively. When Luther was translating the Bible, it was NORMAL for scholars (like Cajetan) to reject the Apocrypha as authoritative in matters of doctrine & teaching (and thus scripture, since ALL scripture is good for that).
That too is not true. The 4th century Councils of Rome and Carthage and the Synod of Hippo all affirmed the the present Catholic Canon. Trent was a definitive defense of the present Canon in response to the errors of the Reformation.