The arguments about vast utilities with small probabilities are both dubious and unnecessary. Eliezer says the probability of unfriendly AI is large, and I can agree. Egan says assertions about the fate of the galaxy involve extreme speculation, and I can also agree.
All you have to argue is that AI will become superhuman enough to win a battle with humanity, and that it can be alien enough to be unfriendly to us, and you have made the case for friendly AI.
The arguments about vast utilities with small probabilities are both dubious and unnecessary. Eliezer says the probability of unfriendly AI is large, and I can agree. Egan says assertions about the fate of the galaxy involve extreme speculation, and I can also agree.
All you have to argue is that AI will become superhuman enough to win a battle with humanity, and that it can be alien enough to be unfriendly to us, and you have made the case for friendly AI.