Andrew Gelman writes:

One reason why these celebrity scientists have such great stories to tell is that they’re not bound by the rules of evidence. Unlike you or me, they’re willing to make strong scientific claims that aren’t backed up by data.

So it’s not just that Sapolsky and Langer are compelling figures with great stories who just happen to be sloppy with the evidence. It’s more that they are compelling figures with great stories in large part because they are willing to be sloppy with the evidence.

An under-appreciated fact which reminded me of this old post of mine.