The more I think of it, I can see how it was a clear-cut call from the gyoji's perspective.
- They have to be ready to make the "winner" call the second after the match is over, and they really don't have time to reason about things like Ozeki runs.
- if they go by prejudicial gut feelings (like favoring higher ranks or favoring Japanese people) they're going to make enough bad calls that they won't be promoted to reffing the Makuuchi matches.
- There's probably an IF-THEN in their head like "if a single wrestler is flying out of the ring, then they lose." That IF-THEN was applied before the "if someone hits the ground inside the ring then they lose" was needed.
Aonishiki did an outstanding job, but it's a lot like in football/soccer where someone makes a beautiful goal but it turns out they were a couple feet offsides so the goal is invalidated. It sucks, but those are the rules.