This is also assuming it doesn't just do something we don't understand at all, which it almost certainly would. Maybe it thinks of a way to shuffle the electrons around in its CPU to create a rip in spacetime and the whole galaxy falls into an alternate dimension where the laws of physics favor the AI and organic matter spontaneously explodes. We just don't know.

We can't foresee the actions an unaligned ASI would take in the same way that a housefly can't foresee the danger of an electric high-voltage fly trap. There's just not enough neurons and intelligence to comprehend it.

The thing is, by definition we can't imagine the sorts of strategies a superhuman intelligence might employ. A lot of the rhetoric against worrying about AGI/ASI alignment focuses on "solving" some of the examples people have come up with for attacks. But these are just that - examples. The real attack could be much more complicated or unexpected. A big part of the problem, I think, is that this concept requires a certain amount of humility. Recognizing that while we are the biggest, baddest thing on Earth right now, this could definitely change very abruptly. We aren't predestined to be the masters of the universe just because we "deserve" it. We'll have to be very clever.