Whatever that means, your posts aren’t explaining anything about what it is you believe.
That long document you did not want to read explains what I believe are the most likely explanations.
Time travelers is one possibility.
Ancient high tech civilizations that were forced to move underground by cataclysms is another possibility.
Mutated versions of humans that also hid underground are another possibility.
The document lists other possibilities as well.
The aliens just look too much like us—two arms, two legs, one head, two eyes—these are clues....
If they want their privacy lying is the best way to keep it—they may have had millions of years of practice.
The contact experiences are just so numerous—all through recorded history—the notion that they are flying back and forth to distant stars makes no sense.
It is like commuting to work in rush hour traffic when you can just as easily work at home.
:-)
Just one other somewhat obscure reference:
Mark Hall claimed to have been contacted by “tall whites” in the Nevada desert north of Area 51—he wrote five books on the subject.
Buried in one paragraph was their admission that they were not really from some distant star—they have lived underneath the Nevada desert for centuries....
This makes sense—matches Native American myths in that area.
At this point they might not even know their true point of origin before they came here—but the claim of distant stars was just nonsense they fed to curious humans they encountered.