I agree. What is the point of having substitutes if they are not in fact used? This is a sport where the athletes spend such a disproportionate amount of time training, for very few 4 minutes opportunities to show the world what they can do. It seems so short sighted (and probably driven by $/expenses) to not have fill each slot to create what could be once in a lifetime and hard earned opportunities for athletes, and by the same token, a full slate of performances for the fans who have paid to watch an event.