I get you but I think you are missing the forest for the trees. For starters this isn't a perspective that is unique to her, numerous other people from former teachers in the system like the late John Taylor Gatto (who has also written quite a number of books on the subject) to scholars like Thomas Sowell. I am not saying that just because a bunch of famous people agree on something therefore it's true but my point is to highlight that she isn't the first to say this and there are many others (myself included) who have also come to the same conclusion. This interview to me is just one more piece of evidence that validates that position. You may not agree with it, and that's fine too. Mentioning her "credentials" is just to give people an idea of who she is and based on that make a decision as to whether she is worth listening to or not.
