My argument is there should not be a strong bias either way, or in context of this thread either trope (like us/totally unlike us) is valid. We do have some related experience in surveying other planets and in that we're not seeing radio emissions from nearby stars.
As some of our great philosophers already postulated, life is either extremely rare, it gets squashed by some force/other, or we're living in a simulation. Okay, there is another anthropomorphic answer, we just 'arrived' sooner than all those other intelligent aliens we haven't discovered. I just find that more unlikely than to say life really is just that rare.
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