The consensus belief that parapsychology is nonsense is not a pre-judgment; it is an informed judgment based on overwhelming evidence.

....this overwhelming evidence coming from paraphsychology studies, and parapsychology studies only.

No, the evidence against precognition comes from overwhelming evidence in favor of a model of physics in which the arrow of time doesn't reverse. The evidence against telepathy comes from studies of communication channels between remote humans that don't show anything outside sound waves and visual-frequency electromagnetic radiation.

It's the constraints imposed by an underlying model we're extremely certain of; not the direct experiments on the parapsychological theory in question.