I mean, what's the goal here? AI does everything and then... and then what? We all die? Most of us die except a select few who rule the world (which, by the way, would not include you or me)?
The reason we won't let AI run rampant is because it's anti-human. Even if AI can do everything, why would we allow it to? We don't have to do that, that's very much a choice.
We're at the point where we have humans advocating not only against other humans, but against themselves. If people are going to be out here arguing for self-destruction on the order of suicide, they might as well save us all the trouble and put a gun in their mouths. At least that way, humanity might have a few less pathetic losers who put computer programs before themselves.
Maybe that's harsh, but that's how I see it.