The latest UFO stuff (particularly the New York Slimes coverage) is a Deep State disinformation campaign designed to hide high-tech weaponry.
Think of it as Operation Mockingbird in action...
https://en.wikipedia.org/wiki/Operation_Mockingbird
(Of course the names have been changed to protect the guilty...)
There could be two issues...real alien operations the Deepstate can do nothing about and of course the use of ‘aliens among us” motifs as a convenient screen by the deep state to hide the high tech stuff you mentioned in your posting.
If you insist on thinking that UFO/UAP are supposed to be “aliens” then you’re disinforming yourself.
A much more likely explanation is that these are simply a secret technology.
And most likely they’ve been paid for out of a black budget.