And why not? It's the only technique they've ever used for anything. Culture has carefully arragned their lives and their beliefs so it works for the 99% that matters and keeps us driving on the right side of the street. So you can't blame them for doing exactly what they were taught from birth.The main problem I see with them is that they start with the conclusion that an event happened, and then work backwards to find the evidence.
We can't expect people to disbelieve in ghosts as long as the belief in spirits is considered unassailable.
Also, as has been pointed out, CTers provide a story. Have you looked at prime-time lately? All we get anymore are cop shows and reality tv. The CTers come off as positively creative compared to that.