Logically . . .
evidently . . .
all such factors
do NOT PRECLUDE their having something to do with so called “ET’s” etc. etc. etc.
either.
Logically, my ability to identify some flying object also does not preclude it being operated by LGM etc. When they lock the cockpit door on United Flight 123 (a clearly identified Boeing 737, let us say), you just don't know what's going on up there. Is Captain Friendly really the human he looks like? Hmmmm? I just watched a documentary called "The Last Starfighter" ... nothing was quite as it seemed ... ;'}
OTOH, logically, suppose I identify something positively as a flying saucer. It's truly saucer shaped, and it's flying. Sure, the pilot could be Thor of the Asgard ... it could also be my neighbor Kevin Smith, a perfectly normal Earth type human.
Heck, it could be ME ... not that if it was, I would tell ... but ya never know ....
MUWAHAHAHAHAHAhahahahahahahahahaha!