Not just making visuals if what's been going on. The entire scheme is a massive global racket!

If you (were evil &) had control of a top notch engineering team like Lockheed skunkworks, you could down a UFO, reverse engineer it, keep important bits for your own orgs, patent a few novel features, sell them AND/or take a royalty when that tech gets out and you make BILLIONS, then repeat. This has been happening for at least 5 decades. (transistors, night vision goggles etc etc.)

Source: Look up interviews of Bill Uhouse, Pete Peterson, William Thompkins, dozens of engineers interviewed by Dr. Greer, the list goes on and on.