In order to compete in free fighting a teacher, instructor or master instructor, must teach his or her knowledge of how to compete and then must prepare his or her students for the championships.
If you as a teacher, coach, instructor or master instructor do not feel competent with your ability to teach competition and yet you want to, the best way is you yourself must try competitions--at least 10 times as a competitor is preferred (as a rule of thumb). Just pushing students to compete and not knowing how to prepare them is unethical. Your students who go to competition at any level are your responsibility--meaning, you have to stand by them at all cost as a teacher, coach, instructor or master instructor, especially if they are from children's classes and it really doesn't matter what kind of championship it is.
Just so you know, I have a friend (a master instructor) who argued, and fought for his students. As a result he fought every referee, and other master instructors in the entire north east coast of USA.
Suk Jun Kim, 9th Dan