He might be referring to applicants into YC. YC generally doesn't accept startups with all business guys and no tech founders, though it readily accepts startups with all tech guys and no business founders.
At the very beginning, you've gotta build. As for knowing what to build, the assertion has been that hackers can learn that. They don't need to have it filtered by a business guy.
I'm guessing that's where he gets his impression from. But then again, until he points to specifics, I'm just guessing.
I enjoy the start-up culture, and especially the tech focus of our community, but if you guys didn't love business like I do then I would have grown bored 340-something days ago.