I disagree - the Septuagint was worked on by dozens of Rabbis and was the greatest translation effort ever at that time. So, it was not set, that was supposed to be the canon as it existed. Also, the Sadducees, as discussed, would not agree that was the “old Testament” at that time. They were ore strict on the books.
You can disagree all you want. The fact is that the Jews did NOT view the apocryphal books as scripture.