Do you think it’s reasonable for two people with all of the same evidence to disagree on precise probabilities and expected values? If so, how would you justify picking your own precise probabilities over someone else’s, if you think theirs are just as defensible?
Or would you just average yours and theirs in some way to get a new distribution? How?
And how far would you go, if you consider all the defensible precise probability distributions anyone could assign (whether or not anyone actually does so)? How do you weigh them all if there are infinitely many of them and no uniform distribution over them?
If you and me and all of humanity gets killed by AI and turned into paperclips, that would be an unprecedented moral catastrophe. If the AIs that killed all of us stay around and enjoy having more paperclips, that is still extremely bad. The very act of killing us makes these AIs not a worthy successor of the human species.
The prospect of AI killing all of us makes these very different. Yes, in both cases a pause will probably slow GDP growth. But humans should be willing to accept lower GDP if this notably reduces the chance of all humans being killed.