Because of a registrar’s error, my daughter couldn’t register for her second semester on the first day (a Friday night! registration was over a weekend). By the time we resolved the issue on Monday morning, the lab section she needed was full and the only one she could get into was right during her practice time. She called me all upset and I said just register for it and tell the coach there was nothing you could do. Within an hour, a miracle occurred and a spot opened up in the full lab section.
Coaches have power.