Not too long ago, someone in the twittersphere asked, "Whatever happened to psi? It used to be all the rage in science fiction."
The answer, essentially, was that John Campbell died and nobody believes in that crap any more. And anyway, it's fantasy.
Now here's the thing. If you accept Clarke's Third Law, which boils down in the common wisdom to "Any sufficiently advanced technology is indistinguishable from magic," you kind of have to ask, "Do we believe psi is crap because it really is crap, or do we just not have the technology to detect or manipulate it?"