Being non-virtuous doesn't all of a sudden turn them into some kind of evil monster. It's just a job for most of them, one that pays well. Being professional and giving treatment like they should (basically following orders) is the easiest way to avoid problems for doctors.

This all changes when they get more difficult patients. As someone who's been told bogus by doctors, even lightly pushing back many will completely change demeanor, you're no longer some easy money but a risk/annoyance. So your good experiences basically just show doctors in their 'perfect state'.

This isn't the same in every country as you say it's a regulated field and the regulations differ wildly from country to country and so does the view and behaviour of doctors.