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, that we are the only intelligences in the universe.
(My point here is not to argue that "the whole SETI business" is a good idea. It is to illustrate that the above style of argument doesn't work very well either way.)
I gather that you accept the Copernican Principle, but I've noticed that cosmologists don't seem to agree upon that. The Copernican Principle would seem to imply that all observers in the universe, regardless of their respective positions in its history, would have the same ability to infer the universe's origins. Yet I've also read arguments that we live in a privileged time in the universe's history when we can still observe distant galaxies, measure their red shifts, and therefore can infer the Big Bang. Astronomers living X billions of years from now w...
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.