Imagine someone plays poker, assuming that the better player won't bluff!
I was under the impression that bluffing is part of a strategy playing poker.
Sure, but if we want to look upon this situation as a "game" then you would have two options: scam/not scam. By assuming that a reputable player that is known not to scam (i.e. good prisoner/dove) would never scam, you are creating a strategy that is easily exploitable
by those players.