Writers and readers have a symbiotic relationship. Each needs the other.
So why, really, do people read? Personally I think most people read to escape, to experience things they might not (or plainly could not) experience in everyday life. They can explore new worlds if science fiction or fantasy, they can feel the adrenaline rush of a car chase, or a race from an exploding volcano or maybe experience a jungle trek astride an elephant in India without actually going there. Fiction offers the opportunity to live another life while remaining safe on the couch.
And that’s just for starters. Readers can also experience the wide range of human emotion and deeply moving experience from the safety of a comfortable chair. Or they can relive an event in their lives via the book in their hands. They can do all this while skipping the boring parts, and they have they opportunity to learn from all this without actually suffering through those experiences first hand.