A mis-aligned super AGI will treat the Earth and everything on it as a playground of atoms and material. Why wouldn't it? What do children do when they see a sandbox? Do they care what happens to any ants or other bugs that might live in it?
There does not need to be a "how", as you put it. The logic is "Maybe we should tread carefully when creating an intelligence that is magnitudes beyond our own". The logic is "Maybe we should tread carefully with these technologies considering they have already progressed to the point where the creators go 'We're not sure what's happening inside the box and it's also doing things we didn't think it could do'".
To just go barreling forward because "Hurr durr that's just nonsense!" is the height of ignorance and not something I expect from this forum.
There does not need to be a "how", as you put it. The logic is "Maybe we should tread carefully when creating an intelligence that is magnitudes beyond our own". The logic is "Maybe we should tread carefully with these technologies considering they have already progressed to the point where the creators go 'We're not sure what's happening inside the box and it's also doing things we didn't think it could do'".
To just go barreling forward because "Hurr durr that's just nonsense!" is the height of ignorance and not something I expect from this forum.