I dont think its absurd, although there's a space in my scientific knowledge making it hard to explain why exactly.

I would assume the damaging effects of crack are due the direct action of the vapour on the tissue, DMT is known to have an apparent caustic effect when snorting, i'm guessing its the same deal with crack, they're both free base alkaloids, to me it just seems very likely the damaging effect would be similar due to the chemical properties that are not concerned with the action on the brain/nervous system.

I'd be quite happy to be 100% wrong, but that's my attempt of explaining my concern.