In the way I view Devil’s advocacy it is not at all about coming up with any argument against a proposition, but coming up with a legitimate one against a belief. “What if a time traveler threw a cake into the asteroid belt?” is not an argument anyone would use in a legitimate debate and likewise is one I would avoid if I was attempting to argue against my own beliefs. Arguing merely for the sake of arguing is indeed useless and irrational, but arguing to try to expose your belief’s weak points is rather extremely helpful.
In the way I view Devil’s advocacy it is not at all about coming up with any argument against a proposition, but coming up with a legitimate one against a belief. “What if a time traveler threw a cake into the asteroid belt?” is not an argument anyone would use in a legitimate debate and likewise is one I would avoid if I was attempting to argue against my own beliefs. Arguing merely for the sake of arguing is indeed useless and irrational, but arguing to try to expose your belief’s weak points is rather extremely helpful.