That line was from Jiro Dreams of Sushi.
Think of this film as a learning by doing model. Bosses would like to invest in training workers, but they fear the workers will leave them high and dry, unable to recoup their investments. Bosses therefore train workers excessively slowly, keeping them as apprentices in the meantime. Only in the end stages of training do the workers learn how to handle the high-margin items, namely the sushi itself. Furth…