I think the key difference is whether the distortion is intentional or just incidental. All things being equal, we&#x27;d prefer fewer incidental distortions of smaller impact.<p>As for intentional distortions, I think the idea goes that they&#x27;re all harmful in some way (some more than others) but that the benefit of behavioural change can outweigh the cost. I don&#x27;t think that would be a terribly controversial statement among economists.