E.g. what if more intelligent aliens truly believed that the only purpose in the world is proving more mathematical theorems? And decided to turn all of the planet into a giant math-proving machine? Destroying all the planet, all the animals, all the humans, all the art, whatever, all to prove more maths?
I love maths, but I'd consider that a pretty bad outcome. And there's no reason that I've ever seen to think that more intelligence implies anything about goals.
Why would such AGI have the means of turning all of the planet into anything? I mean, sure, I also think the Terminator is a decent movie, but that doesn't make it a reasonable blueprint of the future.
Other times, Las Vegas and we shut up because we come up empty -- at best talking about gun control as if someone choking 3 people on a bus was substantially better and not still something where we come up empty.
> Why would such AGI have the means of turning all of the planet into anything?
How does getting off track with that address the main point, namely "Intelligence does not imply goals"? Are you going to prove that while that may be true, there just can't be a way for that to ever have a bad outcome because "Bob"?
> I also think the Terminator is a decent movie, but that doesn't make it a reasonable blueprint of the future.
Neither is "Bob".
There's also not much to fear from slightly-smarter-than humans machines.
But why would you think that's the case? Because we're the best evolution has come up with so far, here on Earth?
"Why would such AGI have the means of turning all of the planet into anything?"
An AI as much smarter than a human than a human is smarter than a dog would think of a strategy far, far smarter that what you, or I, or human civilization could come up with.
Your second paragraph: presumably you think it's literally impossible to invent nanotechnology to make yourself omnipotent, but I'm not willing to place that at less likely than 5%. Something clever enough could probably just manipulate the existing social structures to kill all the humans (something very intelligent that truly wanted nuclear war could probably make it happen). Just a little bit of tweaking to smallpox might be able to destroy humanity anyway. Even just the right new religion might do it (witness the great purges by pretty much every religion ever). None of these suggestions are intended as "this is a plausible way of killing those inconvenient humans"; but if each of my suggestions (nanotech, nuclear war, pandemic, grand new idea like a religion) has a five percent chance of working, that's already a 18.5% chance that exactly one of them would work. Once the humans are dead, of course, it has all the time in the world to achieve all its goals.