> The problem isn't that AI could never be capable of causing real world damage. It is that there is absolutely no fucking path towards human extinction.

I think the "humanity will go extinct" discussion is a silly strawman being propagated either to try to spread fear, as the article suggests, or to make the anti-AI folks look silly, but it detracts from your first point which is that it may be "capable of causing real world damage."

We can be worried about real damage without having to defend the idea that every one of the planet's humans will die.

> "superhuman AI is unlikely to be much of a match against severing fiberoptic cable"

I think that the realistic scenarios all involve humans with an intent to do harm -- creating bio-weapons, finding vulnerabilities in infrastructure -- and using AI to help, so "severing the fiberoptic cable" doesn't apply.