Why are you assuming this hypothetical intelligence will have any motivations beyond the ones we give it? Human's have complex motivations due to evolution, AI motivations are comparatively simple since they are artificially created.
Any intelligence on the level of average human and for sure on the level above it will be able to learn. And learning means it will acquire new motivations, among other things.
Fixed motivation thing is simply a program, not AI. A very advanced program maybe, but ultimately just a scaled up version of the stuff we already have. AI will be different, if we will create it.
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A true super intelligence would need the ability to evolve, and would probably evolve its own wants and needs.
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