One of your problems is that you believe that authority figures tell us what to believe. So some great physicist has an interesting theory. So what? Does that prove that ghosts or UFOs exist? Nope. That's why most of us discuss and debate paranormal incidents based on the evidence. We are quite able to think for ourselves.
I'd be in the 80% because I have seen UFOs and ghosts, however I don't believe the UFOs were spacecraft from beyond the Moon, nor do I believe what appeared to be ghosts were spirits of the dead trying to communicate to the living.