"For Jung God is also another term for the Self ---distinct from the individual self"
In which case it seems that when Jung refers to God/the Self, he is referring to a higher part in a man as distinct from the everyday "wordly ego" ... and certainly not the Creator of The Universe except as a corresponding macrocosm.
Jung made it clear our purpose in life is to grow in consciousness ---because God or the Divine or the Self needs us to become aware"
Again, perhaps here Jung is speaking of the need for a connection to be established through enhanced consciousness between the "ego" and this higher Self. The Self can only be heard and become an influence through this connection.
In this sense, "God cannot be aware without sentient creatures like us" does not refer to the Creator God but our relation to the "inner God"/Self.
Maybe, it then follows that this higher Self also has a connection with an even higher realm and so in this sense, Man can be a conduit for the passage of energy between two levels.
However, without the knowledge and practice of making the lower connection, it is just theory, speculation and daydreams.
For example, perhaps the practice of this was a key part of the teaching that Jesus imparted to his closest disciples which is not in the Bible (as mentioned in the John Gospel). No doubt this would also have been passed on to the early followers in turn, but quickly faded as the religion spread and became diluted and popular. All that was left was the idea of God and the need to "obey" God, be a "witness" and help bring the "Kingdom of God" to Earth etc.
How to actually do this in practice was forgotten in all the popular strands that became mainstream Christianity and replaced with ideas such as "through faith" and "Jesus died for our sins".