The problem is people want to believe... But the fact is as far as we can tell we're very much alone.
The Fermi paradox is the discrepancy between the lack of conclusive evidence of advanced extraterrestrial life compared to the apparently high a priori likelihood of its existence. As a 2015 article put it, "If life is so easy, someone from somewhere must have come calling by now."
https://en.wikipedia.org/wiki/Fermi_paradox
Our world is extremely rare, therefore special and IMO our Galaxy has no meaning without us.
I can't explain the sightings.