Earlier quoted context omitted.
Otherwise-rational and moral people do bad things at the behest of powerful superintelligences with vast resources all the time. We call them “corporations,” and they can convince bright-eyed college graduates to do just about anything. Now, the corporations aren’t deliberately trying to destroy humanity, but they do lots of things that point in that direction. An artificial superintelligence would be able to do the…
Sure, the world was never safe for individuals, and even entire civilisations have gone extinct. For climate change and even nuclear weapons, most of humanity might perish, but there's the hope that some will survive. So, in the past humanity was not in a position to extinguish humanity as a whole.
And this is where I think some of the problem comes from. A lot of AI doomers swam in the same waters as transhumanists, life extension enthusiasts, etc. and got very good at pretending that they were never going to die, or that they would live for a massively superhuman lifespan such that they did not need to think about death. AI doom is much scarier - and thus much more worth posting about - if it represents the first time you’re grappling with your own mortality, as I suspect it is for a lot of younger people in this space.