Being the 'Head Coach' of an international team means absolutely nothing, except that you're the head team manager. You don't actually coach ANYBODY, except the athlete(s) that you have on the team. Let me repeat, being the head coach means nothing but managing the team, that is all. It is mostly politics and ego petting!
For those of you who have no experience whatsoever with international teams, let me turn the light bulb on for you... if you are an athlete, and you make a Worlds/Olympic team, why would you be coached at this ONE meet by somebody who has no earthly idea what you have been doing to lead you to that point?