The article is pointing out how popular stories exacerbate stereotypes that are based in class, and most stereotypes are rooted in some truth. But the whole point of stories are that they are fiction, and yet we often see them as reflecting the real world. Pop culture influences our behavior. You may not care about these issues but the article is merely pointing out that the issues exist and how to mitigate them - should the storyteller choose to do so. There's nothing ridiculous about that.