Yes, we know that Protestants rely on the Bible alone and do not follow the traditions of man:
Nor should we forget that St. Jerome, who translated the entire Bible into Latin left the Catholic Church. In reality the Catholic Church has been studying the Bible for 2000 years. For those who are interested advanced degrees in Sacred Scriptures are available at the Catholic University of America.
“Nor should we forget that St. Jerome, who translated the entire Bible into Latin left the Catholic Church.”
By “Catholic” Church you mean Roman Catholic, based on submission to the Pope. That’s an anachronism, since even “Pope” Gregory the Great, by 600AD, still did not believe in the supremacy of his office (on the contrary, he rebuked the entire concept). Evidently, the Bishops in Rome did not know they were the sole head of the church for quite some time.
As for Jerome, even the RCC regards him as a Doctor of their religion. You just dispense with him because he breaks the idea of a traditional continuity on what is or isn’t inspired scripture.