It allows anybody who reads the piece to apply their own specifics to it. It means that if they hold any "heretical" beliefs, they can assume that PG supports them.
I'm not sure that's true. There's enough insinuation here that I don't think that my grandma would assume PG is advocating for anti-religiosity, for example.
On the other hand, you can spot Andreessen, Haidt, and Lehmann as his reviewers (and similar personalities on previous articles) and have a pretty good idea what views he's actually talking about.