Maybe they can't read the field manual.

Lt. Gen. Harry E. Soyster (USA-Ret), former director of the Defense Intelligence Agency...

And the idea, in fact, these techniques [used by] the experts at the CIA — waterboarding, sleep deprivation, hypothermia, whatever those techniques are — it doesn’t take much expertise to use those. You know, dumb guys in the Middle Ages were doing the same thing. The KGB were strong on sleep deprivation. So there’s no skill required from the CIA. They may need those techniques because of their skill level. And they think that they need them.