I did not take the cruise so cannot answer your question. However, I have seen the northern lights before. That was decades ago. It was awesome.
Over the last few months, we had the opportunity to see them. Could kind of, sort of see them with the unaided eye. On a scale of 1 to 10 for awesomeness, with 10 being most awesome, I’d put it at a 2 or 3. (Scientific, I know.) So, kind of a dud.
However, most anybody’s cell phone photos of that dud? Wow!! Completely unadulterated photos make it look awesome. The camera captures what the eye alone cannot.
Point to any/all: if advertising photos depict awesome photos of the northern lights, might want to do a little more research, as in real life and real time, you might not be able to actually perceive them in that way.