Banning of books

In most literature there is a deeper meaning an in some of the books or short stories you will find racism or violence or oppressed people. in the book the outsiders you see a boy murder another kid now they didn’t ban this book for murder because its a good book but it was violent and cruel. I personally don’t see why you would ban a book or a movie or anything of that nature because some people may want to learn about different stuff then what society tells them they need to know. The problem is society tells people they can’t read that and society holds a voice in the people with power and they ban something to try and keep everyone happy. This is wrong because someone spent good time and effort on that piece for people to be able to read and enjoy and not everyone has the same taste in literature as overs.