If that were true, James Bond movies would fill the screen. Carried to extreme, computers could create action plots where two opposing machines crush each other to the last machine. But no one would care. Even in James Bond movies the spy falls in love. The movie that gets made touches on what it means to be human.
Writing illustrates the human condition.
Even Star Trek stories are about the human condition. Though set megamiles from earth, using science hardly imaginable, on a planet with creatures totally unfamiliar to us, Paramount still wants the stories to be about the human condition. One of their best series of storylines involved the android character Data and whether or not he was human. I think the writers could not have let him be declared a machine. Even in humor we want our characters to portray the human condition.