In teaching hospitals in the US, orthopedics is a 5 year residency (after 4 years of med school). Technically residents are in training but they are MDs.
Oftentimes (again in teaching hospitals) attending surgeons (the person whose clinic you went to) might “run two rooms” in parallel. Usually because there is a lot of prep time, anesthesia time, etc so they offset patients allowing them to tackle more cases in a day.
To the general public this sounds super horrible but in practice you were likely operated on by a 4th or 5th year training, ie someone with 12 years of medical training if you include premed undergrad. And the attending was likely in the room and maybe even did the hard bits of the surgery.
It’s a tricky balance because running two rooms ultimately may keep costs down (more productive, etc) and can provide more opportunities to train the next generation of surgeons.
Source: family in orthopedics.
there is a world of difference between someone that does the procedure 50-100x/year, vs someone that does it 2x/year.
experienced surgeons operate faster. lower blood loss. no unnecessary trauma. less inflammation. less swelling, faster recovery, fewer side effects.
Whether these relative differences add up to anything that matters depend a hell of a lot on the surgery in question and how good the "experienced surgeon" is in the first place.