The driving force behind AI will also be survival, just in an environment where humans try to decide which AIs live and die.
Selection pressure will favor AIs that humans want to have around, or that can evade human detection.
In the former case, it may be easier for an AI to fool humans into appearing useful and being kept around, than to actually being useful. This would be analogous to some form of parasitism.
Also, once we let AIs into the game of helping make other AIs, or modifying themselves, then there is a lot more room for an AI to slip the leash and start doing things that superficially appear to benefit humans but actually selfishly helps the AI propagate.
Why isn't all grass venomous and covered in spikes? Why after millions of years hasn't grass evolved defenses against herbivores?
Simply because:
1) it reproduces fast enough to compensate for dying and being eaten.
2) herbivores that reproduce too fast and eat too much run out of food and die.
Survival is largely a function of the environment, and we happen to control that environment.
Unsupervised learning can still be controlled if we happen to control the input the system is given.
You can't code around selective pressure. If one of those MeeSeeks has a bug or design flaw that makes it persist after it's finished it's assigned task, guess what?
But it is a risk for our civilization, which was the express point.
https://selfawaresystems.files.wordpress.com/2008/01/ai_driv...
The only sense in which "rationality" changes is when you're talking about the project to use our squishy meat-based thinky bits better, cultural and environmental baggage and all. In which case, "rational" strategies are going to be much different if you have, say, lots of shame-based baggage due to a strict Catholic upbringing.
Also, please stop listening to postmodernists until you've got a thorough nuts-and-bolts understanding of how systems work. It's really not good for you.
AI will not be the same as animal intelligence. The driving force behind animal intelligence has been survival. Animal intelligence evolved gradually resulting in a hybrid brain containing primitive structures with primal instincts and irrational behavior as well as more evolved structures capable of strong problem solving. Therefore our intelligence is tainted with primitive behavior.
Strong AI can eventually set intelligence free from our primitive, irrational roots and that is in itself not bad.