I hear ya, but the agenda (mostly) doesn't matter to me. I assume corporate blog posts are published for commercial reasons, even when it's about the author's personal life.
And I've gotten so much value out of HN discussions that benefit the site linkee (lots of awesome threads start out "Show HN: My new site/business").
I guess my main point is: I'm all for the business linked to getting PR, as long as we, the HN members get some cool value out of it. In this case, i thought the post was very topical because talent/skill shortage is a frequently talked about issue here, as are work cultural norms in general.
But I totally respect the opinion that some posts may not have an interesting enough ideas to make PR interesting. That said, I always wait for the other shoe to drop: the HN thread it spawns often ends up being incredible.