Because he's not insane.
Lets go over a few examples:
- When Chris was "possessed by Sonichu", he couldn't keep the act up when he needed to sperg about his cartoon show's changes that he hated.
- When Chris was confessing to Bella about raping Barb, she asked him why he did it, and Chris smugly says "Well, I was very horny", then goes into detail about how much of a stud he was verses all the other guys who porked Barb. The "healing" nonsense was just him trying to put up a retarded defense, which changed over the course of months multiple times to pretend he didn't actually do it.
- He'll put down the Jesus nonsense almost immediately to complain about money.
- In that last interview with the new interview footage, the film guys start asking him about friends, and Chris gets this sad look in his face before pointing up to the roof and claiming Pokemon were up there, because it dawned on him he didn't have any real friends.
Chris would very much like to be insane and see stuff, but he's retarded. He believes his day dreaming is something that no one else can do because he's always the special boy.