Jerome was influenced by the Jews of his time.
And I had shown how most of the fathers that didn't include the deterocanon as Scripture, cites them as Scripture. Too bad.
Even the canon of the Jews weren't even solidified by the time of Jesus. There is no Council of Jamnia which is largely considered bs today.
And let's see some of Jerome's own writings
Does not the SCRIPTURE say: 'Burden not thyself above thy power' [SIRACH 13:2] Jerome, To Eustochium, Epistle 108 (A.D. 404), in NPNF2, VI:207
Do not, my dearest brother, estimate my worth by the number of my years. Gray hairs are not wisdom; it is wisdom which is as good as gray hairs At least that is what Solomon says: "wisdom is the gray hair unto men.’ [Wisdom 4:9]" Moses too in choosing the seventy elders is told to take those whom he knows to be elders indeed, and to select them not for their years but for their discretion (Num. 11:16)? And, as a boy, Daniel judges old men and in the flower of youth condemns the incontinence of age (Daniel 13:55-59, or Story of Susannah 55-59, only found in the Catholic Bibles) Jerome, To Paulinus, Epistle 58 (A.D. 395), in NPNF2, VI:119
"I would cite the words of the psalmist: 'the sacrifices of God are a broken spirit,’ [Ps 51:17] and those of Ezekiel 'I prefer the repentance of a sinner rather than his death,’ [Ez 18:23] AND THOSE OF BARUCH,'Arise, arise, O Jerusalem,’ [Baruch 5:5] AND MANY OTHER PROCLAMATIONS MADE BY THE TRUMPETS OF THE PROPHETS." Jerome, To Oceanus, Epistle 77:4 (A.D. 399), in NPNF2, VI:159
This is the same as Athanasius which means the Deuterocanon is simply "lesser" but is still Scripture.