Isn’t this just a simple case of “get the moisture away”? Blowing into the dishwasher doesn’t move the moist air away, it just moves it around in the box. Blowing out pulls the moist air away from the dishes and out into the room.
If your box fan was pushing dry hot air (like a hair dryer), hot enough to meaningfully speed up evaporation, then blowing in would probably be better.
Hit the old man enough to win by decision but not actually hurt him. That’s the only real winning path - and exactly what happened.