I think the dreaming process is a mysterious unanswered aspect of the human condition. Clearly it serves a natural need or function like any other process.
I’m undecided on if it is a spiritual link to some other state of being, I would like to believe so.
My personal view is I think it could be subverted with wireless mind interface technology.
If that line has been crossed then the organism would need to evolve in response to that threat.
We would need to become more attuned to psychic phenomena in order to protect ourselves. Or we would need to develop technologically to overcome that threat.
Perhaps that is one of the goals of the transhuman metamorphosis proponents. As usual cookie cutter culture want a quick tech solution without putting the hours in to develop organically.