I think, mostly, because re-listening to a song is not time consuming, so I don't feel particularly guilty for wasting that time.
Secondarily, because I am a musician, so I care about the technical minutiae of the craft, which one must listen many times to discover the intricacies of. I have no such desire to learn the technical minutiae of the craft of fiction writing.
Are you an aspiring writer, and does that inform your desire to reread particularly well-written texts?
No, but I used to work in film, so for me there's a ton to learn and appreciate about the craft - camerawork, writing, pacing, editing, performances, sets, locations - the creation of an immersive world that you experience with the characters.