A more direct paraphrasing would be, Just because I don't have all the answers doesn't mean that your answers are correct.
A concrete example: just because scientists don't currently know everything about how evolution happened, that doesn't mean that Young Earth Creationists are right. Typical YEC debating strategy is to look for gaps (real or imagined) in our current theories, and act as if that proves that God created the world in six days, and from the dust created every creeping thing that creepeth upon the earth, etc.
No, it speaks of remedy. It's not about beliefs about the world, but about courses of action, and there he's dead wrong - a course of action can only be bad by comparison to a better alternative.
A monthly thread for posting rationality-related quotes you've seen recently (or had stored in your quotesfile for ages).