From “How to Do Great Work” by Paul Graham:
Schools also give you a misleading impression of what work is like. In school they tell you what the problems are, and they’re almost always soluble using no more than you’ve been taught so far. In real life you have to figure out what the problems are, and you often don’t know if they’re soluble at all.
Schools sometimes also give students the misleading impression that learning is not fun for its own sake and that writing should be boring.