It's one of my pet peeves when people say things like this. Are the criteria for choreography just supposed to be ignored, then? Of course they need to be considered in the results. Even if the choreographer sets out the plan, the judges are only judging whatever choreography the skater actually executes. I don't see how saying the choreography mark is only judging the choreographer is much different from saying giving a GOE, for example, is judging the coach who taught the skater the technique and how to do that element. Obviously having a better coach and a better choreographer is going to be an advantage, and there are many other advantages some skaters might have over others, but what is (or should be) judged is what each skater puts out on the ice in competition.