I actually think the radio signal is an apt comparison. Let's say someone was trying to argue that the signal itself was a fundamental force.

Well then you could make the argument that if you pour a drink into it, the water shorts the electronics and the signal stops playing as the electromagnetic force stops working on the pieces of the radio. This would lead you to believe, through the same logic in my post, that the signal itself is not a fundamental force, but is somehow created through the electromagnetic force interacting with the components, which... It is! The observer might not understand how the signal worked, but they could rule it out as being its own discreet thing.

In the same way, we might not know exactly how our brain produces consciousness, but because the components we can see must be involved, it isn't a discreet phenomenon. Fundamental forces can't have parts or components, they must be completely discreet.

Your example is a really really good one.