The body reflexes to things like mastication, salivation, etc triggered by texture and the presence of actual things in your mouth, so I think the (bias of) argument is more along the lines of reducing the variables away from normal eating. If you look at the military and other people who "starve for a living" (hikers, climbers, explorers etc), these considerations are very self-evident and at the forefront of mind. Its not clear that "wishing them away" (considerations of texture/pallatability) is backed up by any hard science. But I'd be curious to see if there are any leads in that direction.