If your goal is to fly in a realistic manner then yes you would be correct. My point of veiw is a bit different. I have seen many an airplane nearly miss a pilot station during take off because it had drifted left and the pilot did not correct with rudder. Instead as the airplane broke ground it was banked hard right and almost stalled. If the pilot had been trained correctly he would have corrected the yaw before it got to that point. Landings are the same, I have seen lots of approaches where the model was getting pushed in and at the last moment was an aileron turn to get the airplane lined up again. Had rudder been utilized the approach and landing would have been done in a much safer manner.

IMO it's just unsafe to instruct without having the student demonstrate that he has FULL control of his airplane before sending him on his way. I see way too many pilots not have a good understanding of throttle and rudder control before being cut loose by the instructor. Sadly I have seen just as many instructrors that need this skill as well.