There is nothing to address. Parapsychology failed as a way to explain something that has been explained by normal science/psychology. That isn't to say parapsychology failed in and of itself because it did prove that it wasn't ghosts or whatnot i.e. found no reasons to support the notion of anything supernatural; it just failed as an explanation.
I think we are defining 'parapsychology' differently. Genuine parapsychology does not argue for the existence of ghosts or anything else supernatural; rather parapsychology studies phenomena that others interpret as supernatural and attempts to come of with a rational explanation for them; which is something that science has been doing all along since its inception.
The only difference between parapsychology and most other branches of science is that the phenomena studied by parapsychologists are so rare that progress is very slow when compared to branches of science that focus on more mundane subjects like physics and biology. Nevertheless, the basic idea is still the same: come up with rational, quantifiable and falsifiable explanations that don't require some supernatural agency like gods or demons.
This ain't Ghost Hunters. If anything, it's more like Scooby-Doo.