Your teacher was likely correct. But good news organizations also keep a bible of pronunciations I believe, and add to it when new names come up.
As most announcers at at skating events (as compared to TV commentators) don't announce skaters often enough to compile their own "bible", they would have to take the time to make one from scratch.
Having the organizers as registrants for phonetic pronunciations would be the best way to create a guide that all the announcers could use IMO. The ISU collects info on skaters hobbies....I'm thinking that asking for a name pronunciation would not be an undue burden