I think this is an example of reasoning analogous to philosophy's "free will" debate. Human's don't have any more non-deterministic "free will" than a rock. The same is true of any AI, because an AI is just programming. It may be intelligent and sophisticated enough to appear different in a fundamental way, but it really isn't.
It is posible for an optimizing process to make a mistake, and have an AI devolve into a different goal, which is what makes powerful AI look so scary and different. Example: Humans are more subject to each other's whims than evolutionary pressures these days. Evolution has successfully created an intelligent process that doesn't aim solely for genetic reproductive fitness. Oops, right?
A stub on a point that's come up recently.
If I owned a paperclip factory, and casually told my foreman to improve efficiency while I'm away, and he planned a takeover of the country, aiming to devote its entire economy to paperclip manufacturing (apart from the armament factories he needed to invade neighbouring countries and steal their iron mines)... then I'd conclude that my foreman was an idiot (or being wilfully idiotic). He obviously had no idea what I meant. And if he misunderstood me so egregiously, he's certainly not a threat: he's unlikely to reason his way out of a paper bag, let alone to any position of power.
If I owned a paperclip factory, and casually programmed my superintelligent AI to improve efficiency while I'm away, and it planned a takeover of the country... then I can't conclude that the AI is an idiot. It is following its programming. Unlike a human that behaved the same way, it probably knows exactly what I meant to program in. It just doesn't care: it follows its programming, not its knowledge about what its programming is "meant" to be (unless we've successfully programmed in "do what I mean", which is basically the whole of the challenge). We can't therefore conclude that it's incompetent, unable to understand human reasoning, or likely to fail.
We can't reason by analogy with humans. When AIs behave like idiot savants with respect to their motivations, we can't deduce that they're idiots.