The Importance of Narrative in Film

When I was younger and getting into film I heard Blade Runner was so good and I really liked alien so I wanted to to see it and I rented it from Blockbuster and they had that was the only copy they had. It wasn't until years later that I saw that I saw the the directors cut and without itSo yeah yeah I just think it's incredible is there ever a narration that is belongs in a film? Noir would be the answer right like noir if there is an answer it's filmed it's like double indemnity or film or but even then I just wonder like the great gesture of Ridley Scott to take the narration out of blade runner.