Anyone who claims that's just a "talking point" is also claiming that the Holy Spirit is not perfect and therefore cannot be part of the Trinity which is in effect blaspheming the Holy Spirit as well as denying that the Trinity exists.
Facts are facts and the fact of the matter is that Protestants assert that anti-Christ, anti-Christian, Pharisees and their follower Martin Luther are all more perfect than the Holy Spirit
The desperation of Protestantism is clear when the fantasy of a Pharisee council was dreamed up in the eighteen seventies when older Hebrew language versions of several of the books Luther threw out were found and the claim that they shouldn't be included because they weren't written in Hebrew was shown to be nothing but more trash from Luther and his pals.
Until a nitwit heretic like Luther claimed he had the right to alter the canon there was no need to "close" or otherwise confirm what had been accepted for eighteen hundred years which means the BS about it not being closed is just more of the same Protestant revolt againist Christ smokescreen that claiming Luther could alter the canon is.
Typical Protestant circular reasoning : Luther changed the canon so when the Church affirmed that he had no right to do so it "proves" Luther had the right to do so.
Someone can play games all they like but denying that what is in the Septuagint is the inspired Word of God is denying the the perfection of the Holy Spirit. PERIOD
Reading Trent makes that clear and Trent was a response to Luther
Note that the the Orthodox Canon is different than Rome . But, taking the Council of Trent literally, it is not invalidated by their decree.
Here is a list of litany of post-Jerome Western theologians who held to a shorter canon, including many luminaries:
http://turretinfan.blogspot.com/2012/12/william-webster-and-canon-of-old.html