However, as wild talent is a feat, it can be granted by psychic reformation, which invalidates the biology-only premise. In-context, it may be viewed as an endowment of psionic potential, a mental transfer of power quickening the biology. After all, it does cost xp. Regardless of the exact fluff text, because it is mechanically possible, even probable given the high need for survivability, it must be allowed and accounted for in-story. The rules are the physics of the d&d universe, after all.
Once a character has been granted the wild talent feat, they can then train in any psionic class they choose, or is chosen for them. After all, I doubt such an endowment would come without price or strings. The nature of the wild talent may determine how they are subsequently trained as well. Given that wild talent only grants one first level power with a very few power points, this method also does not invalidates the need for further training. Or the need to find a tutor. So the structure and structures of the Will and the Way is still preserved, if you’ll pardon the pun.
A lazy person might not pursue training, happy with a power they can only use once or thrice a day; whereas a diligent or stubborn person might train until they become powerful.
Also, I think a bit of the point has been missed. Dark Sun is the world where everyone and everything has a psionic power. Story-wise, this is supposed to be a mandatory requirement. Mechanically speaking this is no longer enforced in third edition, no random rolls and so forth. I believe that everyone who does not take a psionic class at first level should have to take the wild talent feat. Everyone IS supposed to have the bare minimum of power. Therefore my comment was actually intended to address the genetic possibility of a mutant or throwback who doesn’t have that potential, and how it might be medically addressed.
I believe that the spread of magic is more due to the lure of the forbidden, and the sponsorship of certain… ah, individuals. In any case, as I mentioned at the beginning, while Athas’ charter mandates continuing development of 3.x Dark Sun, and that is part of my desire and goal; my personal desire and goal is more extensive and better treatment of psionics. There are many people out there familiar with magic, and I will leave such work to them, but Dark Sun is a PSIONIC world, ravaged and devastated by magic. I should like to focus my efforts in a psionic direction.