A retrospectoscope is a colloquialism for the process of looking at a situation after-the-fact, when it's easy to "predict" the outcome because the outcome already happened.
What does a retrospectoscope have to do with Healthy Survivorship?
Situations arise where doctors are unable to make a diagnosis or they prescribe treatments that don't help (and maybe even make the patient worse).
If then a new consultant makes the correct diagnosis or prescribes therapy that works, the consultant looks like a hero and, too often, the other doctors are lambasted or sued.
Healthy Survivors realize that physicians draw conclusions and make decisions based on the information available at the time. They realize when a "hero" has information that was not available to the earlier physicians. And they don't abandon excellent physicians who didn't get the correct diagnosis earlier, not because they "missed" the diagnosis, but because there wasn't enough information available yet.