Too many folks have an unnecessarily inflated sense of how aliens might think and the reason they're doing what they do. Crash retrievals could be Alien DUI's sometimes. Recovered bodies could be Alien Tourists. Alien "race wars" could just be a couple smugglers with territory beef.
It seems that there's so many camps of thought that nobody tries to think simply about why aliens might do what they do.
Too many people think they're Angelic Smart, or Beyond Understandable, or like on the Starship Enterprise and everything they do must have a logical and higher intelligence explanation.
For me, I see no reason not to assume they're like us, just a little more technologically advanced. Now maybe some of them are Unknowable or Woo Plasmoid 5th Dimensional beings, but the craft and bodies? They could be like anyone crashing on i95 in the USA.
Abductions, if they're real, don't need to be a scientific hybrid engineering program, it could just be Human Trafficking by assholes who make money/influence/power by doing it in the alien socio-political spectrum.
Crashes (or the alleged "donated" vehicles) could be anything from a breakdown and the occupants are picked up by another ship, to Drunk/high aliens on a joy ride that mess up at the controls and crash.
Alien craft sightings could be like Alien Whale Watchers, where some "boat" pilots are more unscrupulous and get too close/mess with humans because they either don't care or they're chartered by alien rich folks who tell them to get closer.
And the somehow controversial Greys v Reptilians that Grusch just talked about could be any kind of skirmish. Two drunks fighting. Two groups of scientists who wanted a contract and the other ship messed it up for them. Could be that they are both some kind of alien drug runners and are beefing.
But everything people say aliens are doing, doesn't have to be scientists or military or some high level 200IQ reason we cannot understand. They could be doing super normal shit that none of us would think twice about if they heard people doing it, but their tech just looks crazier so we assume it's some enigmatic, unknowable, super intelligent reason for it.
I tend to view most stories about UFOs and aliens by assuming what is happening is understandable and relatable, just like how we understand and relate to animals like cats and dogs and whales and monkeys, even though they're not a lot like us, because sentience has some things like emotions, play, mental illness, physical illness, and rogue assholes that make a lot of actions make sense even if they physiologically or socially resemble us.
TLDR: America has 0 maglev speed trains, and if you heard and saw pictures of a crashed maglev speed train in China, you wouldn't think the passengers were military, scientists, or that the people who made that tech were incredibly different than Americans. So, why don't you look at UFO stories that way?