The Dread is a psionic class from Dreamscarred Press's Psionics Expanded and Psionics Unleashed products. It gains a series of selectable abilities called Terrors, one of which, Nightmare Form, allows a modified version of Ectoplasmic Form which explicitly allows the Dread to retain use of their supernatural abilities (which that spell otherwise blocks).
The list of Terrors also includes one called "Nightmare Touch", which requires Nightmare Form as a prerequisite, and allows the Dread to "use her devastating touch ability while using the Nightmare Form terror, even though she normally cannot make physical attacks". What is the point of this? Devastating Touch is a Supernatural touch attack fluffed as channeled psionic energy, clearly not a physical attack, so Nightmare Touch seems to exist solely to remove a limitation that never existed in the first place. I have looked for any established game definition of a "physical attack", and been unable to find one, though the term is used pretty consistently elsewhere to describe the three types of attacks associated with physical weapons, Bludgeoning, Piercing and Slashing, and to differentiate those from magical attacks such as Devastating Touch. The rules for DR even use the term in the clause that is well-established by consensus to exclude magical damage such as fire and sonic spells, or Devastating touch, from being reduced via DR.
What am I missing here? Is there some other limitation I'm overlooking that would prevent a Dread without Nightmare Touch from using Devastating Touch in Nightmare Form?