I don't think it'S that easy to have a plan for ending the world. It'S not something you can seriously expect someone alone to do in a few minutes. It's complicated. But just because it's too complicated for me doesn't mean it's impossible.
Reiterating my point from above, your 200 police cars which can override a traffic light for a few minutes won't help you fix 2000 red traffic lights. You can still hack the traffic lights. You will still have traffic jams. But whatever.
The biggest danger from AI is that it accidentally destroys the world because it wasn't taught to value it. (Popular scenarios are using the earth for raw material for a dyson sphere or something). Obviously those scenarios make very different assumptions about the state of the world. That'S what I'm worried about. I'm not worried about the singularity happening and creating skynet, because who the fuck would create a malevolent AI?
Again, I would like reiterate that in order to imagine how a superintelligent AI would destroy the world, we'd have to ask one itself! right now our discussion is just "how would hyperflare fuck up the world if he could hack anything", which is so far off the mark it's not even sad anymore.