It seems to me that this is related to the idea of roles. If you don't see yourself as being responsible for handling emergencies, you probably won't do anything about them, hoping someone else will. But if you do see yourself as being the person responsible for handling a crisis situation, then you're a lot more likely to do something about it, because you've taken that responsibility upon yourself.

It's a particularly nuanced response to both take that kind of responsibility for a situation, and then, after carefully evaluating the options, decide that the best course is to do nothing, since it conflicts with that cultivated need to respond. That said, it could easily be a better choice than the alternative of making a probably-bad decision in the spur of the moment with incomplete information. Used properly, it's a level above the position of decisive but unplanned action... though on the surface, it can be hard to distinguish from the default bystander position of passing off responsibility.