Same reason writers insist that reading literary fiction gives you a true and deep understanding of the human condition unachievable by any other means.
A huge problem in fiction is that it usually greatly overestimates people's ability to understand each other. Characters never make mistakes reading each other (unless it's a part of the plot) When they see something one on another, it's assumed to be true, even though in reality this is extremely unreliable.
Habitual readers of fiction tend to be a chore to deal with, as they overestimate their ability to read and understand the thinking of others, inadequatelly communicate as they assume you should be able to read them, and blame any of the inevitable errors on intentional deception from your side.
Habitual readers of fiction tend to be a chore to deal with, as they overestimate their ability to read and understand the thinking of others, inadequatelly communicate as they assume you should be able to read them, and blame any of the inevitable errors on intentional deception from your side.