If the Universe-as-a-Simulation Hypothesis is correct…or the very least where we are somewhere not near the beginning of a chain of intelligent civilizations then the theory that some part of Consciousness does not wholly reside in the brain but rather comes through us like a radio receiver is also probably correct…because the same thing is now happening in our current technology landscape where data and processing increasingly live in the cloud and are downloaded onto the hardware on an as needed, just in time basis.
This follows because the universe shows the pattern of self-similarity all the way up and all the way down (the most popular example of this being Fractals). So the developmental design patterns we converge on as optimal for guiding our technological evolution are very likely the same design patterns present in the evolution of consciousness and humanity.
Having said all that I’m not sure I’ve found anyone’s writing who I believe as the optimal balance between information processing of Consciousness “in-the-cloud” vs. “on-the device”. Almost everyone I’ve read are on the extremes of the path.
Like the liberation of the Buddha-Mind, I prefer the middle path.