This whole thing is a psyop. UFOs? Aliens? unknown earthlings deep underground and in the oceans? extra-dimensional travelers? demons and angels even? (all these things have been used by the narrative). I don't know what it is with this esoteric narrative being pushed by the usual American narrative shapers in popular media and those who have a stage but there is so much more talk of the supernatural as a mass psyop.
None of these things have been witnessed, experienced by regular people. Not a single one of us have had these experiences, none of our family members, friends, colleagues I bet. Yet there it all is. Grainy nonsense, manipulated digital media, stories, claims and yet still nothing of substance or anything witnessed by masses of "regular folks".
If you're waiting for a day where regular folks are being visited by whatever these things are or even a day where many governments come clean and provide actual tangible evidence, you'll be waiting forever. They'll keep teasing you and provide increasingly big claims that somehow never satisfy.