I've read a bit about the scientology cult and their hypnosis technique seems similar. This article mentions that the sleeping person hears the command or quest

I've read a bit about the scientology cult and their hypnosis technique seems similar. This article mentions that the sleeping person hears the command or question as a megaphone type of sound definitely coming from outside the dream. Perhaps an average person perceives such a "megaphone narrator" as trustworthy and remembers the heard commands as important.