That's silly. STEEM and SBD were born from human beings that designed the system. So there is actually full manipulation from its inception. If such inception is projected to give bad outcomes, it must be corrected for the sake of the investment people has made on it. There is no escape to manipulation, since it was already manipulated by its human creators. Markets can go wrong. Good thing is that changing the protocol is sort of democratic/elitist so I have no doubt it won't do any silly changes (hopefully)