On many occasions, I have posted my view that intelligent cultures are extremely rare in the universe & that we might be the only such in our galaxy. I consider it incredibility ignorant or at best naive to believe in the existence of a proliferation of intelligent cultures in the universe.
BTW: I do not claim that there are no other intelligent cultures. I would be surprised if it could be shown that there were none. I only claim that it is likely that many galaxies have no intelligent cultures, and that we might be (not surely are) the only such in our galaxy.
I have made such posts because of the seemingly wide spread belief that there are large numbers of intelligent cultures. Such belief is often accompanied by further belief in the existence of cultures way beyond us in technological development. There are also beliefs in the existence of intelligent life vastly different from us in physiology & biochemistry.
Such beliefs are incredibly arrogant speculations because they are based on little (if any) analysis of what is required for the evolution of intelligent life.
Other than references to the Drake equation (naive at best) & mention of the billions of stars per galaxy, there is never any cogent argument to support such views.
I keep hoping that presentation of my views will result in some cogent analysis supporting opposing views. It has yet to happen.
I once posted some views on the characteristics of intelligent species which might exist elsewhere in the universe. The responses were accusations of being closed minded because I did not believe in intelligent fish-like creatures, intelligent Centaurs (& other creatures with 6-10 limbs, ), intelligent creatures without an appendage capable of holding a tool, and other Scifi intelligent species. Of course there are never any cogent arguments supporting such opposing notions nor any rational critique of the reasons I presented for my views.
While I enjoy & read a lot of Scifi, it usually requires suspension of rational analysis. Insects the size of tigers (or bigger), biological species not fazed by bazookas, telepathic creatures, et cetera are unreasonable although often providing an entertaining story.
BTW: I also enjoy a well written ghost story or plots involving other occult phenomena, but consider such notions to be strictly fictional.