Why Psionics Fails

It is often said that the world is divided into two classes of people: those who like Van Morrison, and those who have met him. 

Another such division that lies across the heart of humanity is those who can tolerate psionics in D&D and those who cannot. I wish to go out on a limb and say that most people who play D&D do not like psionics, and I will go even further out on said limb - indeed, to the point where it begins to bend so outrageously and strenuously that breakage becomes imminent - and say that this is even more true of grognards and those associated with the OSR. The chief complaint would be that AD&D psionics made things unnecessarily complicated, were overpowered, duplicated what magic-users or clerics could do, and ruined the tone of the game. 

The last of these complaints bites most forcefully. Ultimately, it is not beyond the wit of man to develop an elegant and interesting psionics system for D&D and related games. But it is the tone which is the real issue. And this is because the existence of psionics is predicated on a metaphysics which is fundamentally incompatible with those of the typical fantasy world.

What I mean by this is simpler than it sounds. The point of psionics is that mind triumphs over matter. The stuff of the universe can be bent, twisted, and otherwise manipulated by the latent power of the brain. And the psionicist therefore simply decided whether he wants to srariThe point of magic in a fantasy setting is that it is supernatural - it is a mysterious overarching force which can be channelled so as to supervene in the physical world. Obviously it requires intellect to learn spells, but spells themselves are not outgrowths of happenings within the brain. They are things written down and memorised, yes, but their origins are extrinsic to it. 

These different metaphysics tug in diametrically opposite directions. Does mind triumph over matter? Or is mind subordinate to supernature, which it taps into but never dominates? There is no right or wrong answer to these questions, but they tug themselves apart all the same. In practice, what I think this translates into is simply a sense that psionics 'feels wrong' in a high fantasy campaign setting. It discomobulates our sense of what 'fantasy' entails. This is not, though, due merely to genre expectation. It is a function of the fact that psionics and magic each require the individual to simultaneously adopt two, mutually contradictory, ideas about the nature of reality. Does it conform to (or can it be made to conform to) the mind? Or does the mind channel what is 'out there' in nature (magic) into real-world effects?