People who don't know what they're seeing might jump to conclusions. For instance, a pilot described one UAP as a cube within a transparent sphere. We have radar jamming technology that fits that description. It looks like a cube within a transparent sphere, but if you weren't aware of that you might wrongly conclude that it's alien technology. It isn't alien technology. It's ours.
Government agencies and businesses in the private sector are constantly developing new tech. In order to protect their intellectual property, they're unlikely to tell each other what they're doing.
There is talk of non-human pilots, but not even non-human biologics necessarily points to aliens. Some of the first space flights by the USA and USSR employed non-human pilots. We sent animals into space before we sent humans.
Regarding the seemingly impossible movements that some supposed craft take, much of it might be illusion. Take photons, for instance. Light can change direction quite quickly. Shine a laser pointer at the wall and move the dot around. Is that dot a craft? Do its sudden movements defy the laws of physics? Of course not. Cutting edge photonics and holographics are much more advanced than a simple laser pointer.
And then there's the matter of misjudging distances. Some of the military videos have been debunked as rear-views of fighter jets and even digital camera artifacts. Also, an object that's close to you and quite small might look like it's moving faster than if it was miles away.
The assertion that our government is reverse-engineering advanced technology might serve a strategic purpose. To discourage enemies. That might be what's going on, or they might just be bluffing.
I think UFO/UAP sightings are real, and should be investigated by the government. I'm open to the possibility that we're not alone in the universe, but until there is tangible evidence that it's alien technology or something angelic/demonic I'm more inclined to think that it's of human origin.
It's potentially too horrible to mention. Please forgive me for being so tantalizing and mysterious.
I will tell you that UFOs (aka UAPs) are potentially fallen angels.
Potentially. If they are angelic beings, however, it's also possible that they're not fallen.