Especially when you think about the studies on split-brain patients. That's hard to square away with the idea of our mind being somewhere else transmitting to us ... unless you hypothesize that for every person, there's two minds out there, each transmitting to half of your brain, and then your brain meshes their thoughts together ... but if your brain is capable of integrating the thoughts together, then the argument is weakening as clearly the brain has some thinking ability.

Yeah, for every experiment / example / specimen we know of that changes some function F of the mind, it rules out the possibility of F being performed 'elsewhere' and the results simply being received.

We're at the point now where your 'receiver' is doing basically all the work and, if it's connected to anything else, that thing just supplies formless 'mojo' that has no identifiable effect on the working of the mind.

See also: When you are drunk, it is not like you are fully lucid but unable to control your body or your mouth. Your mind/personality itself actually changes.

And of course you cannot will yourself to become drunk.

It is pretty trivial that the matter affects the mind, not vice versa.

I'm not sure what that person's version of the antenna idea is, but mine generally implies the brain is still in charge of the actual effects themselves, but needs somewhere to send it all to. The "somewhere" isn't chemical, and is just a receiver, and can't do anything if the sender (the brain) is damaged.

The "somewhere" is distinguished due to the fact that a given person is a specific person and not another person (if you deny this, this makes ethics and emphatic transfer unworkable, which doesn't seem right).