I can imagine that an AI first destroys humanity, then poofs away before reaching for the stars, for sure. My point is that the window is quite narrow there.
I can also appreciate the argument that we are special and a space-faring civilization, artificial or otherwise, did not arise until now, or at least not in any visible to us ways, let alone a lightcone-consuming way. But that argument is not really new.
I might be missing your point...
Still trying to reconcile “we are in a singularity or shortly will be, where the predictability horizon is shrinking fast” with “and yet we are nearly certain that the SAI will kill us all”. I guess the best analogy I saw is that of a rising river, where you know it will overflow the banks, but you don’t know which stream will break first.