Part of it is to ensure that your medical students are not terrified by "chemicals". Plus, doing organic chemistry instills into you the idea that reactions may not be pure, and that enantiomers are both real and potentially problematic (see thalidomide). It is at minimum a way to get you to be able to ask critical questions when needed, even if there is already an infrastructure to answer those questions for you.

It is sort of like learning C but programming solely in Python: you can get your job done, but when one of your abstractions breaks it is worthwhile to be able to at least identify the root cause and talk to the right people.