How is it even remotely possible that we're alone?
Question: Why is Carl Sagan so lonely? (pick one)(a) Sagan is lonely because, as a true devotee of science, a noble and reliable method of attaining knowledge, he feels increasingly isolated in a world in which, as Bronowski has said, there is a failure of nerve and men seem willing to undertake anything other than the rigors of science and believe anything at all: in Velikovski, von Daniken, even in Mr. and Mrs. Barney Hill, who reported being captured and taken aboard a spaceship in Vermont.
(b) Sagan is lonely because, after great expectations, he has not discovered ETIs in the Cosmos, because chimpanzees don't talk, dolphins don't talk, humpback whales sing only to other humpback whales, and he has heard nothing but random noise from the Cosmos, and because Vikings 1 and 2 failed to discover evidence of even the most rudimentary organic life in the soil of Mars.
(c) Sagan is lonely because, once everything in the Cosmos, including man, is reduced to the sphere of immanence, matter in interaction, there is no one left to talk to except other transcending intelligences from other worlds.-- from Walker Percy's Lost In The Cosmos: The Last Self-Help Book
Because the rest of the universe wants absolutely nothing to do with us. And quite frankly, I do not blame them.
And yet we are effectively and practically alone.
The distance is insurmountable in a thousand lifetimes.
Well, it is REMOTELY possible, if you know what I mean. Everything in that picture is a few billion years old.
"It must be so" is not a very good scientific argument.