My favorite is when he got caught masturbating in public and responded with “If only it were as easy to banish hunger by rubbing the belly.” Or when Plato was teaching a class and defined a man as a featherless biped, and Diogenes brought a plucked chicken to the class and said “Behold, Plato’s man!”
Not disagreeing with you at all, you made a pretty good point. But when engineering the prompt takes 80% of the effort that just writing the essay (or code for that matter) would take, I think most people would rather write it themselves.