Earlier quoted context omitted.
That research was oriented towards making sure it wasn't possible though. 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.
Was drugging random Americans with LSD also a valid experiment? Parts of the CIA was just insane back then, maybe still is.
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.