I don't think the HN community ever intended to promote out-of-the-box thinking. When I read Paul Graham's essays (and I've read most of them), I get the sense that HN is an attempt to create a community of 'bright lights' i.e. smart people, and provide a supportive environment of other 'smart people' without all the dog-eat-dog, macho,take-no-prisoners, slash and burn nonsense that makes up a good deal of human behavior.
And that's a fine and noble pursuit, however, the market place is not delicate academic utopia, and so one has to wonder how these very bright, but often impractical people, whose genius has been nurtured, pampered and flattered are going to deal with the realities of the market place and the end consumers of their 'product'.
Enter the Y-combinator business model, where for a mere 51% of your company, the harsh realities of business will be taken care of by our team of take-no-prisoners business warriors, leaving you, delicate genius, to be nurtured and cultivated to your fullest potential.
And again, I have no problem with that, I just have a problem with undemocratic secret societies that wield power from the shadows. They are prone to corruption and calcification.