When I got avalanched in '84 I ended up with a punctured and collapsed lung in a Swiss Hospital. The doctor who was going to insert the chest drain came in with his long scalpel and eight students. They were all armed with stethoscopes so they could listen to the air leaving my chest cavity as he pushed the knife in. Well, I wasn't going to be left out of that so I asked for a stethoscope of my own - I wanted to hear it too. Someone had a spare so I got to hear it. It was very disappointing - just the faintest gurgle.
But senior doctors don't normally bring students to patients they aren't convinced will have a good outcome. They have an image to maintain.