It's not something they would rush into for the reasons you point to, but it's not unheard of (e.g Harris and Harris), and if the goal of YC is to maximize the

It's not something they would rush into for the reasons you point to, but it's not unheard of (e.g Harris and Harris), and if the goal of YC is to maximize the number of companies they can fund then an IPO may make sense at some point.