I do not know why the heavens look empty but I think it's extremely unlikely that they are. Andromeda e.g. is only 2.5M light years away; that's nothing on an evolutionary timescale. There are too many planets for us to be the first to get this far. I think about this all time.
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otoh what hypotheses do predict that we would be near a very early but not extremely early star?
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"we're the first" predicts this but only for a pretty limited parameter range i think
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