The point isn't to exactly duplicate reality -- if that's what you want, you could just turn off the TV, put down the comic book, and go outdoors. Naturalistic fiction is just about creating a convincing illusion of reality, an imaginary story that feels convincing to the audience, at least for the duration of the story. It's like the old bromide about sincerity: "If you can fake that, you've got it made."
Have you seen My Week with Marilyn?
Kenneth Branagh (as Laurence Olivier) does a funny variation on that:
"Acting is all about honesty. If you can fake that, you'll have a long career."