Some coaches are also referees. I think it is good for a coach to be a good referee. It should help make for a better coach, in many ways. Some coaches are very good referees, perhaps even international level. I am not that good. There are still times when I am a better referee than the one we have available. Which brings me to my point - it can be difficult at times to separate "advocating for my fencer" from "the referee is the referee and I am not". I can't imagine how much harder it would be if said referee were also hoping that I would still hire him for an upcoming tournament while he is claiming my HS kid did not get right of way.