I suspect that the whole SETI business derives from the same bugs in our evolved theory of mind which have also given us god beliefs, the Turing Test, conversations with Siri apps and other delusions.We have no evidence that minds similar to what humans display exist anywhere else in the universe.
We also shouldn't get carried away with our lucky guess about the existence of exoplanets. Exoplanets do not imply ET. Until about 20 years ago when exoplanets started to become observable, even "skeptics" believed in their existence even though they met their own criteria for extraordinary claims, as in Carl Sagan's essay, "The Dragon in my Garage." We now call the Dragon ET instead of exoplanets.
To flip this around:
...I suspect that the whole we're-alone-in-the-universe business derives from the same bugs in our evolved theory of mind which have also given us geocentrism, "Man is the measure of all things," literal Adam-and-Eve creationism, humans-with-bumpy-foreheads in Star Trek, Teilhard de Chardin's "Omega Point," faith that AGI will be human-friendly by default because AGI is so smart and humans are obviously great, and other delusions. We have no evidence that Earth and humanity are special to the point of utter uniqueness
It's interesting to see someone with actual political power (with balance of power in the Senate and being part of the Lower House coalition) talking about the Great Filter.