If these dreams are truly inorganic then that means they are being directly put into our subconscious and activate when we sleep. From what I'm understanding however, these dreams are not just regular but memories. False ones.

There are some parts of a person's memory that cannot be accessed by the waking mind, but in sleep they can be. So, these shifts have been planted into our memory, but only the subconscious one.

...It's just a theory though.