hi Alex, dawn.
if someone gives any excuse for why they wouldn't demonstrate such abilities they claim to have I would say because they can not! they are quite literally speaking out of the wrong orifice.
Quantum physics does not deal with the mind or have a philosophy of mind to my knowledge and if I remember correctly there are some scientists about who are far better acquainted with the actual subject who can correct any misunderstanding being thrown about.
If there was enough evidence for something being true there may be doubters (such as young earth or flat earth believers) but the evidence would speak for itself. what people want to believe is not the point of actual evidence, the point of evidence if proof, to show something is. there are those who hate evolution and try to show it didn't happen through pseudo-science doesn't make it any less true!
He who knows only his own side of the case knows little of that. His reasons may be good, and no one may have been able to refute them.
But if he is equally unable to refute the reasons on the opposite side, if he does not so much as know what they are, he has no ground for preferring either opinion …
He must be able to hear them from persons who actually believe them … he must know them in their most plausible and persuasive form.