Fully agree about teaching them properly but this need not include adding power immediately after rotation stops and whilst the nose is still below the horizon. If you get it right the power will slightly reduce the height loss but when the average bod recovers from his/her first accidental solo spin they are unlikely to coordinate power and pull correctly - the result will either be excessive height loss because of a late pull or another departure from a premature pull.
KISS is a good maxim, the possible benefits of power after the recovery (or even during!) are not necessary for the average bod and are more likely to lead to problems.
HFD