Again: that is looking at it from a Jewish sensibility (of which there are many). The idea that later scholarship can overturn theology that has been in place since the first Church Fathers is, likewise, in keeping with Protestant sensibility. Why wouldn’t a Protestant feel as if he or she could interpret Holy Scriptures and be as likely to come up with a legitimate understanding as anyone else, if that person belongs to a denomination that rejects the teaching authority of the Church in favor of morals that are based on personal interpretation of Scriptures?
Likewise, some level of belief in opinion as the arbiter of truth and a one-person-one-vote parity of opinions is a common contemporary American sentiment. There could be nothing more typical of a citizen of the United States than the idea that “your opinion isn’t any better than mine.” It is not rare for this to be held as true even when a person is comparing the value of his or her opinion against the opinion of someone who has a far better foundational knowledge of the issue at hand. As the bumper sticker says, “Question Authority.”
The plain meaning of Scriptures does not teach a “Question Authority” code of morals. Read the New Testament. Nowhere does it say “trust your own judgment.” It says “trust the reliable: that is, those who teach what the Apostles teach”, and in many the inspired writings warn the reader to escape the fate of those who trusted their own judgment over what they were taught. There is also a warning for those who do teach: “Not many of you should become teachers, my brothers, for you realize that we will be judged more strictly”. (James 3:1)
That is where personal conscience is supposed to operate: that is, from the foundation of a formation in keeping with the Apostolic Tradition, with the teaching of the Magisterium. The Church is not one voice among a multitude. To believe that is to make the mistake of relativism. No, when the Church teaches about faith or morals, the Church teaches the truth.