I agree that would have prevented a lot of misunderstandings but Navy operates this way all the time. They prefer a somewhat "blinded" subject.
How are you going to keep the other pilots from figuring out they're test subjects?
Especially if any word about the experiment got out. Swearing another pilot to secrecy versus letting them think you're nuts for the rest of your lives, I think they're gonna pick door #1.
I guess what I'm saying is (whether real or fake) this could be a controlled leak for strategic benefit.