[throwawayalien]

Reports and witnessing of UFOs are not something that started happening only in recent times. And by recent, I mean the last ~80 years (which is far longer than the 10-20 year window). You can find examples - stories and depictions of UFOs - throughout the history.

[awb]

There have been stories throughout history of ghosts, supernatural powers, witchcraft, dragons, Bigfoot, a flat Earth, etc.

Eye witness testimony is notoriously poor evidence on it’s own.

Of course anything is possible, but stories alone are not sufficient evidence since we do have a history of misinterpreting things or making things up without physical evidence and buying into it en mass.