How Disneyland helps show the difference between fiction and fake

When lazy writers want to dismiss something as fake, they often compare it to Disneyland. The implication is that theme parks are fake places — artificial creations that are not as worthy as something authentic and real.
I always wonder if such writers are as dismissive of Broadway shows, novels or motion pictures. Those are all works of fiction, as are most theme park attractions, but those art forms rarely get the same type of across-the-board critical disdain as theme parks do. So what&