Rules 6-6-6 & 7-5-4 clearly spell out coach misconduct. In a close contest, there is no excuse for a coach to cost his team a point. A coach is allowed to pop off once, with no recourse. After that warning, only a selfish coach would go back to the well for more.
Not sure how it works in gymnastics, but I would be surprised if the coach wasn't warned at some point. She also admitted she was wrong, but argued that the rule hadn't been enforced before. That's a pretty weak argument, in my opinion.