From this article, it doesn't sound like Hari's books are anything unusual: most topical, with-the-times popular non-fiction is poorly sourced and relies on assertions instead of scholarly or scientific studies — and that's fine! It's okay to have an idea, think about it hard, and write about it, even if you can't prove that your thesis reflects reality. It's better and more worthy of respect if you can, of course, but what Hari's doing right now isn't wrongdoing; it's just expressing opinions that many people find interesting and insightful.
There's certainly nothing to justify the title of this article, at any rate.