Singularitarians desire to build a master AI to run the world. They realize that it's really hard to get right, and switch to arguing against it.
Normies don't desire to build a master, they make an AI that they can just not use when it does something wrong.
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Basically, the LessWrong arguments are not always careful to distinguish between Seed AIs, Superintelligent AIs, Sovereign AIs, Perfect Bayesian Reasoners, Optimizers, Optimized AIs, and probably several other kinds.
I expect the arguments are full of type errors.
