That's not true. It depends on the type of classes and the professors. Some professors and TA would go to great length to show how programming are done, especially the intro classes. Of course there's always some amount of self-learning, as in any discipline you can't be spoonfed for all materials without doing it yourself.

You go further with self motivation and self-learning since there're only so many class hours, and there're a lot more topics in programming.