Earlier quoted context omitted.
There's a whole lot of seemingly rational and well grounded theorizing about why aliens should exist. But there's no evidence for it, despite many years of looking. At a certain point, when you can't reconcile observed reality with your beautiful theory, you've got to question the theory. That's the essence of science, discarding theories that cannot be reconciled with observed reality. It may be the case that advanc…
There’s “no evidence” only if you ignore what has been happening on our skies for the past 70+ years. To be sure SETI has found nothing, nor has Hubble, nor JWT, nor Sloan nor Voyager nor Opportunity. Yet something keeps showing up in our skies, year after year, decade after decade, and that something is widely and roundly ignored.
Because 'aliens might exist' is a theory and 'there is stuff that happens in the sky that has not been formally explained' is a fact, why should we connect the two as evidence of one another?
'Cockroaches taste like jellybeans' is a theory. 'Many people waking up in the middle of the night, having heard a rustling, without being able to see put something in their mouth that tastes like a jellybean, living near and employed at a jellybean factory' is not evidence of this theory.