Answer:
Because school isn't reflective of the real world
Explanation:
Our education system is in desperate need of reform. The way we learn was created 100 years ago to prepare us for a mundane factory job.
Memorizing random facts doesn't help our education better than clicking two rocks together. Finland has half the amount of schoolwork the US has, and students don't memorize for a test, they gain experiences to learn.
Also, I heard that doctors don't use textbooks anymore to research symptoms -- they use Google.