"Yes. What was the church thinking, giving out doctorates in Sacred Theology? Church doctrines are all so easy to understand that we don't need any experts - just our own private judgment inspired by the Holy Ghost."
Liberals always claim this. The simple people are too dumb to understand doctrines written in plain language--though it was the unschooled faithful who held onto the faith through the ages whenever the hierarchy failed. What you claim is the typical mantra of modernists. It is what the critical scholars claim when they dissect the Gospels and decide what we should or should not believe. They were the ones telling Mel Gibson he got his take on the Passion all wrong, that he needed experts to tell him how to think about the Gospels. The Pope did the same with Lefebvre. He didn't truly understand Tradition--experts were needed. Hogwash. Of the two men, Lefebvre had the wiser faith.
Therefore, in that famous letter of his to the faithful of the Church at Meta, Our predecessor, Innocent III, quite wisely prescribes as follows: "In truth the secret mysteries of faith are not to be exposed to all everywhere, since they cannot be understood by all everywhere, but only by those who can grasp them with the intellect of faith. Therefore, to the more simple the Apostle says: "I gave you milk to drink as unto little ones in Christ, not meat". For solid food is the elders, as he said: "We speak wisdom . . . among the perfect"; "for I judged not myself to know anything among you, but Jesus Christ and Him Crucified". For so great is the depth of Divine Scripture that not only the simple and unlearned, but even the learned and prudent are not fully able to explore the understanding of it. (Pius VII, "Magno et acerbo", DZ 1605)