Well, it's this simple really... When you take into consideration that we know bupkis about why & times that the very little we really know about where, subtract the sheer number of things that there actually are in existence, & carry the two, what are we left with?
"ears still open ... listening for intelligent life" "You won't find that here." Indeed not! The Monty Pythons already said so a while back... "Pray that there's intelligent life somewhere up in space, 'Cause there's bugger all down here on Earth."