Please don’t sugar coat your opinions.
The danger in this case is that he is living in a fantasy world, at many different levels. A therapist told me: "Never take something away without being able to replace it with something that includes hope".
Having a fantasy dissolve, even a mild one, can make it seem like the entire world has disappeared. When these fantasies are tied to ego, (we are smart, we are attractive, we are lovable, we have the capacity to earn money) the effect is magnified many times. We hear about people committing suicide over what seem to us to be small things, but to the subject those things made up the whole world.
On the other hand, there are sociopaths that aren't phased by anything, they just construct the next lie. I don't think a sociopath would be moved by having his current fantasy dashed.