You're saying "of course it isn't" - but how do you know that?
At the time the Soviets had the same sort of projects. So until you're sure it's not possible, the potential capability is an enormous threat if it is.
How they went about that research is where the waste creeps in.
> Brigadier General Dean Hopgood: Yes sir. But now that they are doing psy-research, we're gonna have to do psy-research, sir. We can't afford to have the Russian's leading the field in the paranormal.
Source: The Men Who Stare at Goats
It was a giant waste of time and money and, this being the CIA, it likely harmed many people.
Let me be clear: these were all wrong and unethical, and I would not have approved or conducted them. But if you're a government agency tasked with doing wrong and unethical things in the name of national security, they were all good ideas to at least try.