I was going to point that out too as I think it demonstrates an important lesson. They were still wrong.

Almost all of their thought processes were correct, but they still got to the wrong result because they looked at solutions too narrowly. It's quite possible that many of the objections to AI, rejuvenation, cryonics, are correct but if there's another path they're not considering, we could still end up with the same result. Just like a Chess program doesn't think like a human, but can still beat one and an airplane doesn't fly like a bird, but can still fly.