Yep. That's true.
But unfortunately the pilots who have seen these things and folks from the Pentagon and Senate Committees (on Intel) say that they are too advanced to be our tech.
Who’s to say some know the truth and have been lying? People who have TS-SCI clearances lie to people all the time about what they do while they’re doing that kind of work and still later while their NDA’s are still in effect. Maybe this tech has been held so tightly that only a few dozen people know about it for sure at this point. Think of Rummsfeld’s Unknown Unknowns, there are a lot of things we simply do not know that we do not know. I’m not saying I know 100% that these things are ours, I am making the case that these objects are most likely of US origin simply because that makes the most sense, think Occam’s razor.
Who knows, maybe the government had Nikola Tesla’s notes all along and they’ve had a double secret SCI quadruple code word program since the 1920’s or so and they finally decoded Tesla’s notes and formulas and these objects are the end result of the breakthroughs provided by Tesla’s work.