He conflates world class bullshitters with people who just speak off the cuff about things they don't know much about, or people who make predictions that turn out to be wrong, or even just people with whom he disagrees, but who are generally pretty earnest in their beliefs, right or wrong. These aren't the same, and it muddies the waters.

I agree that the most extreme cases of post-truth celebrity liars, while perhaps not a new phenomenon, may be parts, symptoms, or mechanisms of some new phenomenon that really deserves to be thoughtfully explored. But this article ain't that.