My point isn't to agree with the author that every company should try to be a game-changer. In fact, too many SV companies already think that they are game-changers before they've even launched anything. That's part of the problem.
My point is that when you have the startup process manufactured and replicated into a kind of meta-startup (like YC), at a certain point the goals of the founders become more about conforming to the community and impressing each other rather than creating a genuine product.
Obviously not all YC startups are like this, but any time something grows and scales, there is a danger of it losing its original purpose.