school isnt necessarily about learning, its about repetition and conformity. you "learn" information that sticks with you for a few weeks, then repeat it to teh teacher to get a good grade. it teaches you that conformity is good, you do exactly what they say and are taught to follow rules and dont go outside of them. school is about thinking in the box.
none of this is my idea, i personally think that i learn a lot from school in terms of academics and things that will be helpful later in life, as well as social skills. but in the end, you get out of it what you put into it