Most "uap pheenomena" are personal anecdotes about subjective experiences.

I am sure that most anecdotes are honest recounts of what someone experienced, but 1000 anecdotes do not = one solid bit of evidence. An 'experience' is not necessarily external.

There are thousands of anecdotes about religious visions, also. The human mind is a powerful thing and interpreting its own patterns is dealt with in Phenomenological philosophy.

note: I do NOT 'deny' the possible truth of real 'uap' or 'ufo' occurrences. I merely have followed the stories for about 65 years with hope that some WOULD be authenticated.
So far, none of the supposed musings and semi-denials and reluctant shrugs about possibilities from those who should know... if there is anything to be known.. pass the test. I've watched many TV programs and read about Roswell and Area 51 till I can't take any more.....
There was a 'famous' photo of 4 lights in the sky in formation many years ago. Some guy glued 4 cotton balls to his window and recreated the photo almost exactly... and so it goes.

Physics & chemistry are such that certain conditions WILL produce events leading to DNA and a lot of complex results.
   If I had an extra $, I'd bet that in billions of galaxies with 10²³ stars, there are...or have been... other places with sentient life.
I'd also bet that none of them can overcome the limits of space/time that we find insurmountable. Maybe someday? *shrug* I think my $ is safe.

Over & out...