If you work in walk-in emergency health care you tend to take calling actual 911 way more seriously than most people do from what I understand, even though some would say there's not a huge difference between calling emergency services (911) and calling emergency services (non-emergency line). It's a point of nuance and a lot of people will tell you--911 is for the big and bad, usually near-deadly situations.
Anyway it's interesting that there really was a legitimately deadly serious situation in multiple ways, and this person who represents the circumspect nursing community seemingly took even more additional circumspect care in phoning it in. When a lot of people in such a situation would have probably given up much earlier and perhaps even lost their composure & ability to work completely.