Hi Brian, I agree with you for the most part! But saying "they won't be anything like us" is a risky prediction. I'd say AI won't be like us in every aspect, but it'll be in some.
We anthropomorphize AI because we're biased. But rejecting the possibility of building something similar in outcome following a different path is naïve.
Nature has a way to do things, but it need not be the only one. Evolution has a very defined and restricted set of parameters to go on, and a very clear optimization function. We can overcome those and arrive at similar results (in terms of behavior) more efficiently.