Following such a heuristic doesn't at all mean making strong high-certainty judgments.
I agree, but the fantastic thing is that you lose so little when you reject too hastily. If the ideas you ignored turn out to be useful and true, someone you're willing to listen to will advocate them eventually.
Tyler Cowen argues in a TED talk (~15 min) that stories pervade our mental lives. He thinks they are a major source of cognitive biases and, on the margin, we should be more suspicious of them - especially simple stories. Here's an interesting quote about the meta-level: