There's also nothing in medical doctor training, as well. Or in fact in most specialist training - e.g. my father-in-law who's an ObGyn couldn't you how an mRNA vaccine works beyond what he learns from reading the same material I can - it's not a relevant part of his training beyond "they work and here's the list you should be giving babies as soon as possible".

Medical professions, the ones you interact with as a patient are essentially highly specialized mechanics for the human body.