It's a bit like bringing someone from south Florida to northern Michigan this winter for some ice fishing. I understand that it's cold here, I intellectually know about, have observed the effects of, and can treat frostbite and other problems resulting from this cold - but all that would make it hard for me to intuit the problems of a visitor who was unable to control their fingers when they removed their gloves and dipped their hands into a minnow bucket to bait a hook. My fingers work fine in that bucket, everyone else on the lake is doing it, you're just going to dry them off in a few seconds and put them back in warm gloves...what's the issue?
I've just witnessed this with my partner's recent bout with cancer. While her oncological surgeon completely understands, her reconstructive surgeon had no conception of what she was going through.
That alone is 16 straight years of normalizing sleep deprivation. Time spent studying and working is regularly 80+ hours per week, certainly from med school onward and certainly the year spent studying for the MCAT.
If they start at 16 and finish their residency at 30 or 32, that's the only life they've ever known for all of their formative years. They cannot relate to people with a normal schedule because they have not experienced it.
Let's not even get started on how many nurses smoke.
Similarly, doctors and nurses do not have significant experience in being a patient, especially one who isn't around hospitals all day.