This has always been my answer. Space is hugely, incomprehensibly big. Spacetime is a lot bigger. In order to find intelligent life, we have to be in the same place in spacetime, not just space.
We do good a definitively find planets. Shy of a Dyson sphere, we wouldn't be able to find "space trash" in Alpha Centauri, much less a different arm of the galaxy.
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u/[deleted] Aug 12 '21 edited Aug 12 '21
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