HN is primarily about programming because the majority of its users are programmers. The majority of hackers are programmers. The majority of hacks are program-related.

Lately, there's been way, way too much content that's horribly recycled, unfounded punditry and speculation, and a variety of very loosely business-related articles, like this one, that are terribly written. I'm perfectly content to use "programming related" as a first tier filter for content.

Edit: also, the piece itself was about management. What management, if not management of programmers, is relevant on HN? I would give allowance if it were an insightful piece on being a technical person managing creative or business types in a startup environment, but it wasn't.