Do the extraterrestrials have any kind of working model and understanding of the human deep subconscious, or is it simply that trial and error produced a way to program humans effectively, without a true understanding on their part?

They view what has happened to human as a technological triumph from their own genetic modification of the human genome. What they do not understand is they have a similar defect. So they believe they can access the entirety of their mind but humans cannot, when in fact both humans and the extraterrestrials, all three of the major members of the Extraterrestrial Alliance, have a deep subconscious that is beyond conscious awareness and has become a playground for the spirit meddlers to corrupt them.