> If they don't know that a % of their portfolio will fail, then they're idiots.
Yes, but they don't know which ones. What the commenter meant is that the VC believes each and every one of their investments has the potential to become a rocketship. So they spread the risk into several potential rocketships and hope for one of them to not crash.
Yes, but they don't know which ones. What the commenter meant is that the VC believes each and every one of their investments has the potential to become a rocketship. So they spread the risk into several potential rocketships and hope for one of them to not crash.