The waiter needs you to like him; the doctor doesn't.
I'm not surprised that people from highly technical fields tend to have gaping holes in their
knowledge. Scientists and engineers are often spectacularly ignorant about art, music and literature (as humanities graduates likely are about basic science and math). There are only so many hours in a day and particularly young people just haven't banged around enough to learn anything important yet.
But they still have the aptitude for it -- anybody who builds a ladder in some topic can in principle build a ladder in
any topic -- reason is one of
the foundational abilities, probably second only to curiosity in predictive value for who makes it to the top of an intellectual endeavor. I find it very weird and I assume it very rare for someone highly accomplished in anything other than some oddball one-off skill like athletics or musicianship to also lack the "rules of construction" for feeding in information and making logical connections. Dude climbed that ladder
at least once -- we know that. So what happened to cause the rungs to fall out of his ladder?