Either you condition the observation (of surviving 1000 attempts) on the observer existing, and you have 1 in both cases, or you don’t condition it on the observer and you have p^-1000 in both cases. You can’t have it both ways.
Either you condition the observation (of surviving 1000 attempts) on the observer existing, and you have 1 in both cases, or you don’t condition it on the observer and you have p^-1000 in both cases. You can’t have it both ways.