OK, lets break that down more though - Imagine this scenario: You are a founder, you go YC, you grow a bit, but end up with a company that is settling down into a lifestyle company, while it still satisfies you personally. The early investors (YC) push for an exit, but they are a minority of the shareholders. Certainly, you are grateful to them, and have learned much. But at the end of the day, the growth and big exit is a goal of a minority, not you personally.

I understand completely why this is a problem for YC. I just don't see it as being such a problem for the founders.