Anyone can claim to be a writer, but it seems obvious that he actually _is_ a writer. See: the book he wrote.
Writing also _can_ be more than just fluff, but it doesn't need to be. It may not be your style, but long form, not-concise content has it's place. See: The New Yorker, etc.
I don't disagree with the feedback that it's rambling; for some, that destroys the value, while for others that's the point.
It's also an interesting representation of a topic he touches on; that social media has turned everything in to bite-sized nuggets of insight with no meat around them, that nobody – not even literary reviewers – have the patience to sit down and fully digest anything longer than a simple blog post length summary.