I mostly wanted to hear opinions on whether to believe it or not. But anyways, I'm not so sure that you're correct. I think we should find out whether big world immortality should affect our decisions or not. If it is true then I believe that we should, for instance, worry quite a bit about the measure of comfortable survival scenarios versus uncomfortable scenarios. This might have implications regarding, for example, whether or not to sign up for cryonics (I'm not interested in general, but if it significantly increases the likelihood that big world immortality leads to something comfortable, I might) or worrying about existential risk (from a purely selfish point of view, existential risk is much more threatening if I'm guaranteed to survive no matter what, but from my point of view no one else is, than in the case where it's just as likely to wipe me out as anyone else).
If you're going to worry about things like that if big world immortality is true, you can just worry about them anyway, because the only thing that you will ever observe (even if big world immortality is false) is that you always continue to survive, even when other people die, even from things like nuclear war.
Your observations will always be compatible with your personal immortality, no matter what the truth is.
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
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