There is no such thing as GHOSTS....Demons yes.
I've encountered demented beings in the dark, and embedded behind hateful eyes. None of them were ever human I'm quite confident. So yes I agree.
That is not to say there aren't fetches, aka spirit walkers, aka interactive remote viewers, but those are humans living in the flesh.
This world is very old and very haunted, but not by us sapiens. We do our thing and then we go elsewhere.
Right. Demons.