PhD's are generally so schooled in their discipline that they view the Gospel in the light of their educational training. A scholar studies economics and then everything looks to him like it can be explained in economic terms. Or a scholar studies philosophy and then everything looks like it can be fit into a paradigm matching their school of thought.
Joseph Smith's early education was so limited that our children have a comparable education at the conclusion of fourth grade. But what he learned from on-high, by revelation, made him a towering pillar of light and truth.
Joseph once commented that if you could gaze into heaven for five minutes you would know more that if you read everything that had ever been written on the subject. Now imagine the libraries that are filled with material written by the world's scholars and theologians about heaven. Those who have written include such luminaries as St. Thomas Aquinas, St. Augustine, Dante, Rabbi Bacharach and Buddha. Yet five minutes of "gazing" would supplant all they had to offer.
The wonder of it all is that so few are willing to trust a prophet's advice. We read endlessly uninspired books written by the uninformed, and bypass the process commended to us by the scriptures.
A bad education (which is most educations) is worse than no education when it comes to the things of heaven. When men are learned they think they are wise, and therefore have little reason to trust in God or revelation from Him to correct their misunderstanding. I think the Book of Mormon had something to say about that. (See 2 Ne. 9: 28-29, 42.) I consider myself a fool. (That is the one advantage I have over those who also hold doctorates. I know it does not provide me with any advantages, but does impose considerable disadvantages because of its corrosion to my thinking.)
Heaven is an endless source of surprises. There's nothing mundane going on there.