I agree with everything you are saying, with a caveat. I saw a ton of stuff on call as a resident. And as a CA-3 carrying the bag we got an unbelievable amount of autonomy.
In your example, though, I don't think the resident sitting the case is gonna be around in the PACU for that exploding carotid anyway. You either went home or are sitting your next case. Unless you are talking about the resident covering the PACU rotation. Our on call CA-3 residents cover the PACU at night as well with us covering as back up for anything that they might need. They go home at 3pm on general OR days for lectures, pre-op evals, or work-life balance. So, they still have the opportunity to be in the hospital to see this stuff.
There is certainly a balance to be had here, and I am not going to disagree that you need experience as much as knowledge. They are synergistic, really. You cannot have a valid conversation about something that just happened by using your experience alone. CRNA's love to tout that logic. You won't have the knowledge if you only have experience from being in the OR. And you won't have the knowledge if you don't have time to read and study on your own outside of the OR. They both must exist.
All I am implying is that when a residency places the importance of relieving CRNA's over resident education, that's a massive issue, IMO. It seems to be happening more and more frequently.
If a program has round a way to accomplish both placing a large emphasis on resident education and making the rest of the staff happy, then I am all about it. But the priority should be on resident education.