It's pretty clear the viewpoint is "any negative depiction of poor people is bad," and more broadly, "class divide exists and is significant."
Not really no, that's just your interpretation of what this supposed viewpoint may be.
I don't think the author is presenting these ideas based on "any negative depiction of poor people is bad". It's more as a pointer on these common tropes that exist in storytelling, and some of the implied unrealistic assumptions that underly them.
Similarly, your comment didn't specify anything about what this political viewpoint might be, nor any reasons why you think this article is based on such a viewpoint.