The judge told Arturo he wouldn't reschedule for him. He's not barring him from the courtroom; the judge is simply saying he's not making any more accomodations for Uber.
A judge can kick a specific attorney out of the courtroom, but I think the standards are pretty high for doing so. I don't know if that's just custom or an established rule.
Judges have some awesome powers inside their courtrooms. I find law to be a pretty fascinating subject but that is a long post for another day.
I took the question to ask more or less, "Is their any judicial obligation to avoid scheduling conflict, when the attorney is already obligated to be present at a different court-related function".
I assume this is usually granted by courtesy, but a fed up judge has no obligation to do so.
IANAL.