Yes. Most social commentary like the parent article here is essentially worthless. A point to start discussion, but on it's own almost completely void of meaning.
No, he mean all social commentary. Almost all of the journalists and professors who preach the point of view you advocate (big bad corporations and fox news stealing from the poor) did not themselves experience poverty. And some right-wingers experienced it too. So "throw out stuff I don't like" does not follow from your claim that only people who have experienced poverty can speak about it.
Correct, throw it out.