The military recently released its report on UFOs and, as several sources in the media have indicated, it was disappointing. I share that disappointment but I am anything but surprised.
It seems reasonable that if evidence of alien visitation or instrumentality in UFOs was believed to exist, that information would be too sensational to keep quiet. Scully and Mulder notwithstanding, it's a secret too amazing to keep bottled up. It would have leaked, and it has not.
The report's conclusion: there are sightings we can't explain using current science and we've go no idea what they are or how they work. Could it be ETs? Sure it could. If so, they've been very careful and clever in keeping hard evidence of their presence out of our hands.
You could argue that ET's version of "don't give high tech to low tech creatures (us) as it ruins them" requires them to be elusive so as not to upset our cultural 'applecart.' You could believe that ... I would hope you are correct.
UFOs could also simply be physical phenomena which occur under peculiar conditions not well understood by us. Phenomena governed by physical laws which we've not yet decoded or misunderstood.
My question: does the principle of Occam's razor suggest ETs as a cause, or mysterious physical phenomena? Or maybe it is God messing with us? I have no clue.