[goatlover]

So the real question is about plausibility, not possibility?

It's possible that predatory aliens will show up on our doorstep sometime in the next few decades. But it's not very likely, and not something we need to prepare for.

[mannykannot]

By claiming the impossibility of an AI apocalypse, Chollet attempts to avoid discussing any other possibility / plausibility / likelihood than zero, but claiming impossibility brings with it a burden of proof that his arguments cannot carry.

As to whether an AI apocalypse is more or less likely than an invasion by predatory aliens, I would guess that it might be the more likely one, but I wouldn't put much effort into defending that position.