> So why hasn’t the military given any of these explanations?
> Well, the Department of Defense’s policy is to report even “incursions that are initially reported as UAP [Unidentified Aerial Phenomena] when the observer cannot immediately [emphasis added] identify what he or she is observing.” It is entirely possible that these examples were all identified after the initial report, but still bureaucratically classified as UAPs. The Pentagon has confirmed the footage is real, but has said nothing about the content of the footage.
It most probably is just a failure of imagination.
Of course, no amount of data will put this to rest. When other instruments will have failed to register the same event, people will not accept the obvious conclusion (the one instrument that "caught" it was malfunctioning/misinterpreted one way or another), they will start claiming that not only are the objects special, they are also invisible to radar/infrared/[...].
Furthermore, even if it is absolutely true that the military has a huge host of UAP that they have worked hard to identify and failed, and they are briefing the senators on the details, that does not mean that there is no explanation, it just means that trying to accurately explain a phenomenon that happened once or twice is extremely hard.
I have a backlog of dozens of bugs in my product that a customer has seen once or twice, with logs that show me they are right, that make no sense given the code and that we have been unable to reproduce. Should I conclude that alien devices interfered with my software to deceive my customer? Obviously not: complex systems are complex and have many corner case behaviors that we may never have a completely satisfying explanation for.