I don't understand where this impression comes from - HN used to be about entrepreneurship much more than it is now, and it's what drew many of the first waves of users. There are so many science/tech sites, but very few (just two afaik and one is almost dead...) about software/tech entrepreneurship (at least in the 'DIY' sense - where it's the technical people driving the business rather than being a resource).

I don't have stats but I've been here since the beginning and I remember a much higher ratio of hard tech/comp sci articles to tech business articles.

I don't have stats either, maybe it's observation bias.