Why do we even need Libraries?

People that love to learn. Homeless people getting out of the cold or heat. People that need help with paperwork they don't understand. Learning new job skills and hobbies. Artists of any kind doing research for their work. People that want to travel the world but don't have the money or the freedom to. They are the gateway to other worlds and ways of looking at the world. If knowledge is power then libraries make us powerful. For even in fiction we can learn.