It's certainly one way to go for a character who wants to believe that Adstring is the real deal.

I think the idea is that after a while, you don't know which is the dream and which is waking up, thus the fact that it's an event could be the mind's excuse for it to make the hallucination work. But yeah, after the event was over, it would be iffy because no matter which is real, this is the one you're stuck with.

I guess some people might subconsciously cling to whichever one they deem to be reality, so while some people would not want to sleep, some people would want nothing more than to sleep.