I think it's safe to assume that even though YC is dedicated to empowering entrepreneurs, in reality it's only internet entrepreneurs that get most (if not all) of the attention.
Many web startups are like "throw-away injection" devices, built for the sole purpose of commercialising and popularising that particular technology. If it is an excellent product, that contributes by adding value, and therefore imparts meaning to the user, than by all means it is OK to build such a thing to flip it.
But what about the OTHER entrepreneurs, startup guys/girls that don't just want to start web startups, but any kind of company? Web startups are such a small minority of of the entrepreneurial category. Whether 2000 or not, shouldn't this message seem relevant even today? Is there nothing sacred, nothing timeless, nothing that can transcend ourselves?
Interestingly, though, you'd also be out of luck with a lot of potential employees. The more ambitious ones want options that might make them rich. Without any prospect of an exit, you lose all the hotshots to competitors who offer such a prospect. That's why big, private tech companies are so rare.