@Lustig Andrei,
I suppose there can be mess ups but I only need my teeth cleaned.
I hope.
I worked closely with a rheumatology clinic and, yes, there was training going on. I taught some of the residents research technique stuff in our lab(s), and some of them were more facile with hand eye coordination than others but none of them were clinical dodos. You do hear stuff, and the only dodo I knew of was history.
Our clinicians met quite often as a group, residents and the seniors, to talk about what to do re patient problems and I think they met way more often than that re routine goings on, hallway talk. All of our head guys attended a variety of clinics, and none of them were shy.
We didn't deal with students as such, so I don't know, but I'd be surprised if they aren't well supervised re the patients.
As many know, I go to an eye clinic. It would be hard for me to recommend my surgeon more, and I'm a fair judge of that.