Susan Blackmore dedicated half her career trying to prove everything you claimed in your post. She concluded it was all fraud, deceit, Delusion and superstition.
I have not read Susan Blackmore, so I cannot comment specifically on her findings; but I don't see how this refutes the entire field of parapsychology any more than incidents of fraud refute any branch of science. Scientists in all disciplines have sometimes resorted to deceit in order to substantiate their theories, but that says nothing about science as a whole.
If paranormal phenomena cannot be examined using the scientific method, then what does that leave us? Religion? Witchcraft? Philosophical conjectures? If you are so certain that parapsychology is a failed venture, then what method would you suggest be used? Oh, I know that's a rhetorical question for you since you don't believe in the existence of the paranormal to begin with; but what about those of us who have either experienced it first hand or believe those who have?
Simply ignoring the paranormal does not address it; it simply evades it. Scientists may come to erroneous conclusions in their search for knowledge, but simply ignoring anything only perpetuates ignorance. As difficult as it is to study such an elusive subject using the scientific method, I think it's still the best available solution; if not the optimal one. To do less or to discourage others from doing research in this area is, in my opinion, to actively hold back scientific progress and to aid and abet charlatans who are all too happy to exploit people's superstitions for their own personal gain.