“any aliens advanced enough to travel light years of distance, from far-away star systems, are utterly incapable of locating and retrieving their vehicles from the far-more-powerful humans.”
Possible explanations:
—The “aliens” are expendable—clones or automatons—for exploration or scientific study purposes only. The smart aliens back home are not going to risk their necks on distant potentially hostile planets.
—The technology and aliens were a “gift” designed to help with reverse engineering by our primitive civilization.
—The aliens are actually from here and live here—hidden by high tech.
—Time travel from the future (mentioned by a previous poster). They are from “here”.
If you are interested in this topic an excellent essay is here:
https://thejournalofcosmology.com/Puthoff.pdf
Excellent comment.
Look for “Alien Interview”. This is an account provided by a nurse who claimed to have helped debrief an ET recovered from the Roswell crash. She said the ET was a “doll”, a manufactured body that was controlled telepathically by a remote entity. She said that the “dolls” were completely expendable. (It was what we call a Grey)