The problem is that our democratic institutions are not doing a good job of producing accountability and legitimacy. Our politics and government bureaucracies are just as corrupted as our private corporations. Sure, in theory we can vote the politicians out of power, but in practice that never happens: Congress has incumbent reelection rates in the 90s.
The unfortunate truth is that nobody is really qualified to be making governance-of-humanity decisions. The real problem is that we have centralized power so much in governments and megacorporations that the few elites at the top end up making decisions that impact everyone even though they aren't qualified to do it. Historically, the only fix for that has been to decentralize power: to give no one the power to make decisions that impact large numbers of people.
Making intelligent machines? Colour me disturbed.
Let me ask you this re: "the domain is technical and cognitively demanding" -- do you think Sam Altman (or a Steve Jobs, Peter Thiel, etc.) would pass a software engineer technical interview at e.g. Google? (Not saying those interviews are perfect, they suck, but we'll use that as a gatekeeper for now.). I'm betting the answer is quite strongly "no."
So the selection criterion here is not the ability to perform technically. Unless we're redefining technical. Which leaves us with "intellectually demanding" and "smart", which, well, frankly also applies to lawyers, politicians, etc.
My worry is right now that the farther you go up at any of these organizations, the more the kind of intelligence and skills trends towards the "is good at manipulating and convincing others" kind of spectrum vs the "is good at manipulating and convincing machines" kind of spectrum. And it is into the former that we're concentrating more and more power.
(All that said, it does seem like Sutskever would definitely pass said interview, and he's likely much smarter than I am. But I remain unconvined that that kind of smarts is the kind of smarts that should be making governance-of-humanity decisions)
As terrible as politicians and various "abstract model" applying folks might be, at least they are nominally subject to being voted out of power.