You might have just explained the phenomenon of AI doomsayers overlapping with ea/rat types, which I otherwise found inexplicable. EA/Rs seem kind of appalingly positivist otherwise.

I mean, that's also because of their mutual association with Eliezer Yudkowski, who is (AIUI) a believer in the Singularity, as well as being one of the main wellsprings of "Rationalist" philosophy.