Like a lot of ageing Military Helicopter Pilots I spent most of my time flying an unarmed aircraft with the prospect of fighting ADAs like the ZSU with a 9mm pistol. Having spent a number of years flying the AH64 I know what I would rather be in if faced with any ADA. I think Lu is barking up a tree here and I cant really see the point of the argument. Who cares what the US Military said or did not say to their Pilots? Maybe its their own fault for being so gullable.
The Apache is an awesome machine, but like any helicopter is not invulnerable or invisible but in the right hands will survive longer than any unarmed aircraft in the same environment.