Simply put, instead of having to remove ords from the plane when they're taken out at the field, have the plane launch without them and give a system message to you (or not, doesn't really matter) that the ords weren't loaded.
It could make the flow better than getting a message box stating that ords are not available, having to click OK, enter the hangar, remove the ordinance, then pick the runway again.
Not really a game changing wish, just convenience.