I do think the Yud-esque superintelligence fear is a bit like cheetahs fearing "a 200mph cheetah" or giraffes fearing "a 500ft giraffe." There's more than just smarts, we're just jealous because that's "our" thing.
But the further this goes on, I start to think... is that right? Or is it just smarts all the way down?
One of the biggest misconceptions people have about intelligence is seeing it as some kind of unbounded scalar stat, like height. "Future AI will have 10,000 IQ", that sort of thing. Intelligence is a conversion ratio, with an optimality bound. Increasing intelligence is not so much like "making the tower taller", it's more like "making the ball rounder". At some point it's already pretty damn spherical and any improvement is marginal.
Now of course smart humans aren't quite at the optimal bound yet on an individual level, and machines will have many advantages besides intelligence -- mostly the removal of biological bottlenecks: greater processing speed, unlimited working memory, unlimited memory with perfect recall... but these are mostly things humans can also access through externalized cognitive tools.