"Why should you trust your Doctor?" asks "Lefty" Fuller. As Dawkins shows, because if you loose respect for what enlightenment values have given us, tens of thousands of children die of easily curable diseases. And vile conspiracy theories, pandering to the worst prejudices, become common place.
We should take great care that we do not loose the tangible benefits of reason in our headlong rush to replace evidence and the scientific method on the altar of our private feelings