That agrees with my intuitions. I had some series of ideas that ware developing around the idea that exploiting biases was sometimes necessary, and then I found:

Eliezer on Informers and Persuaders

I finally note, with regret, that in a world containing Persuaders, it may make sense for a second-order Informer to be deliberately eloquent if the issue has already been obscured by an eloquent Persuader - just exactly as elegant as the previous Persuader, no more, no less. It's a pity that this wonderful excuse exists, but in the real world, well...

It would seem that in trying to defend others against heuristic exploitation it may be more expedient to exploit heuristics yourself.