The conclusion says,
"Where Is Everyone?
Estimates suggest that there are at least a hundred billion stars
(other more accurate calculations put that results at 250 billion stars +/- 150 billion, and as many planets multiplied by 10 (2.5tn), and then 100 (250tn) for moons), in the Milky Way alone, let alone in other galaxies. Despite this, outer space seems eerily quiet – so much so that the Italian-American physicist Enrico Fermi (1901-54) once asked, “But where is everybody?”
‘Where are all the aliens?’ is a puzzle astrophysicists have so far failed to adequately answer. Yet whilst the modern Catholic Church has a more neutral view on whether or not life exists beyond Earth, Aquinas was forthright: he argued that space is, in fact, desolate, and that Earth and humanity have a special place and purpose in God’s scheme of things.
Given that no clear evidence to date has established that there is in fact any life beyond Earth, St Thomas Aquinas has yet to be proven wrong."
It's not a puzzle in the slightest. In geological time, as soon as it rained here, there was life. Within 200my +/- 100m. I mean, it's early Thursday afternoon since creation (a billion years is but a day) and there's been life since the small hours of Sunday morning. The universe teems with life. Gamma ray bursters notwithstanding. Chemistry obviously easily does respiratory proteins (if you can do one peptide, you might as well do a hundred thousand), as brilliantly outlined 10 years ago by Nick Lane in his peerless
The Vital Question https://en.wikipedia.org/wiki/The_Vital_Question.
There is no scientific evidence whatsoever, of course, false positive biosignatures are impossible to eliminate over hundreds (we've all but exhausted the tens) of light years, for now, but there is perfectly rational strong uniformitarianism. I.e. we have more than enough science, since Democritus, to know, epistemologically, that everywhere you point, within the redundantly named Milky Way galaxy alone, someone's pointing back.
And that's all they will ever do.
There's nothing eerie about whatever signals they're making being utterly swamped by star radio noise (lasers, masers you say! Uh huh. 100kW, 10^5 W... vs 10^15-18 of the sun alone). Let alone the fact that interstellar travel is meaningless without woo. Nobody in this infinitesimal universe or any of the infinity of same-measured-constant universes from eternity (yeah, yeah, yeah; presentist I know) ever gets to Kardashev I. No solettas to morse your sun. Everyone peaks at Kardashian 0
https://philosophynow.org/issues/164/We ... verse_Gets. We can't even make 1000 year (order of magnitude) old rockets redundant with a space elevator, despite having carbon nanotube.