These are good points and should be troubling for mediums and psychics and charlatons. What this point of view doesn't include though are all of the times when psychics made predictions that were right, often occuring in dreams and prophecies and so on. It's really cherry picking the data. What it also doesn't take into account is that these kind of abilities - like precognition - come at random. Many ordinary people have had dreams that contain elements that come true on the following day. But that must be written off as mere coincidence because to do otherwise breaks the materialist world view that there is nothing else out there.There are big million dollar prizes for people who demonstrate paranormal abilities in supervised controlled conditions
However this line of reasoning holds no water to materialists who have already made their minds up without looking at all of the evidence in the first place. Essentially, if a theory sounds reasonable and makes sense, why look? What could be found? This is how they think. It's like when Einstein tried to disprove quantum theory with classical physics, Einstein's 'spooky action at a distance'. There can't really be two particles that can affect each other at any distance can there? That would be... paranormal... spooky... it can't be real...