Why is it that all these poeple come into contact with aliens and all the info they gain is what they look like, where they come from and what technology (or lack of) do they gian from them.
Not that I dont believe they met aliens, I just dont understand why these people are incapable of extracting anything valuable from them apart from:

I saw aliens
I talked to aliens
This is where they come from
I worked with them on technology
This is what they looked like

Is that all your interested in?
Anyway an alien species that accepts to work for a military that kills, maims, tortures, rapes and steals from the rest of the world has a lot of explaining to do.