Works of fiction borrow heavily from real life and writer's perspersonal experiences. Very rarely does fiction garner notice when it is completely divorsed from the reality and experiences and questions of most people's lives. It is good at showing other people's and idealogocal perspectives without bringing as many preconceptions as a straight copy from real life often would.

"Of course it is a work of fiction, Harry, but why on earth should that mean that it is not real?" - Dumbledore, paraphrased

Works of fiction are critical to understanding the society in which they're made and interpreted.