You mean like Stuart Russell, who literally wrote the book on AI? You mean like the Google Brain team and OpenAI, who are actively researching how to control superintelligence? I can't help but notice that the people who aren't alarmed by the consequences of superintelligence are people who haven't bothered to read the arguments.

No but his PR team have done wonders in making the average Joe think he's the smartest man in the world and therefore the papers will run with anything he comes out with,

Either way, this seems like an appeal to authority.