This is funny. I’m sure referees in all sports are instructed to not look like this. They can go consult other refs if they are unsure, or better yet, just make a call with a lot of confidence and firm gesticulations and you can get away with any call.
I definitely don’t have the personality to be a ref. I’d be shrugging my shoulders at all times. Those great athletes move really fast. I’d mostly just try to stay out of the way.