I used to think "well med school is really hard, so the bare minimum for a doctor is pretty good". Then I started working in healthcare and realize, no, that's not true at all.
The best example I can think of is when I worked on a project where we wanted to get ready for a much better competitor in a disease area. Not "slightly better", but "mind blowing better and not using it would be malpractice". Most doctors had heard of it, but we want to remind them not to purchase the company's older drug because they'll just return it a year later.
Turns out there were multiple doctors, after the new drug was approved and available, that continued to use the old drug. We literally had to go to them and say "hey stop buying the company's drug please". And I realized, damn, these doctors' patients are getting really shitty treatment.