Agreed -- the counter-theory for his motivations in the linked essay doesn't hold up to Occam's razor compared to this explanation. (Without knowing anything about the author of the linked essay, it felt like there was a bit of projection going on there...)

Yes, he didn't go to great lengths to cryptographically protect his identity. He's not Edward Snowden, he's just some guy who started writing some essays on a blog, and used a somewhat half-hearted pseudonym probably never imagining it would get popular enough for anyone to look into it further than possibly googling his pseudonym.