It's true that moderation comments are out-of-band for the site. But they're necessary, because the system can't right itself without them. If it helps at all, they're even more tedious to write than they are to read.

Edit: mlevental points out that you were referring to the article, not my comment. I think there's plenty of intellectual curiosity in what Jessica wrote, especially in the blog post explaining why she did it. In fact, I'd say it's obvious. That commenters don't always respond to curiosity with curiosity of their own is a separate issue.

Certainly it's also a promotional post in the sense of wanting to call attention to the program, but that sort of mix is common on HN, and it's where it is on the front page because users upvoted it.