This is kind of a problem with preventive ethics in general. It seems to me that given two bad choices, the best option is actually neither - that is, to prevent the choice from being necessary. To use the common example of the trolley problem, the best answer isn’t to choose one option or another, it’s to prevent the trolley from being about to run someone over in the first place.

Unfortunately the visibility of these non-events means that their heroes go unnoticed. Noticing them would require a fundamental reorganization of how we perceive time and the future.