He wasn't going to send her to any hospital. He knew that now. At a hospital they'd just start shooting her full of drugs and tell her to adjust. What they wouldn't see is that she is adjusting. That's what the insanity is. She's adjusting to something. The insanity is the adjustment. Insanity isn't necessarily a step in the wrong direction, it can be an intermediate step in a right direction. It wasn't necessarily a disease. It could be part of a cure.