One has to wonder why that would produce the sorts of behavior we see from people with damaged brains. I mean there’s only so far you can stretch that analogy, as a damaged radio will usually just make the signal very noisy so it stops sounding like music, or it will stutter or something.
But people with various forms of brain damage aren’t behaving like there’s noise in the signal. They’re behaving as if areas of the brain associated with controlling different aspects of behavior have become damaged. Famously people with frontal lobe neurodegenerative diseases are behaving with less social inhibitions. People with damage to the motor cortex have problems moving. People who suffer damage to the visual cortex have various forms of problems with sight. Etc.
Even more weirdly, some medications or drugs have mind-altering side-effects. Some medications against high blood pressure give their users nightmares. Literal bad dreams at night when they go to sleep. Why on Earth would a chemical compound alter the mind-signal entering the brain such that people start having bad dreams? Is there a sort of “bad dreams” wave being broadcast everywhere, that the brain normally just doesn’t recieve?
More importantly, any radio can interact with the same radio waves. But only specific brains seem to be able to pick up a particular mind-signal. My brain isn’t receiving the signal from your mind, it’s apparently only receiving “mine”. How does the signal know which brain to interact with? Why are the atoms in my brain and my brain alone able to pick up this signal, and no other atoms are able to do this? How does the signal know that this carbon or nitrogen atom is from my brain, and not a carbon atom in a pencil, or a piece of paper, or a piece of my skin? At what level or degree of cellular differentiation do cells that become neurons start to become able to pick up this signal?
We can literally grow brain tissue in petri dishes. Do they receive this mysterious mind-signal too? Is a unique mind assigned to every such piece of growing tissue?
Then there’s split brain patients.