Yes, I think if we could get rid of this notion we can probably move in interesting directions. Another way to look at it: if we take any object with sufficient complexity in the universe, how could it interact with other object of sufficient complexity? If we look at humans, as first order augmentation devices for other humans, it's notable that the difference between levels of complexity of their internal state is much higher than the level of complexity of input at any sufficiently small time frame (whatever measurement you decide to take). Basically, the whole state is encoded internally, by means of successive undifirentiated input. In that sense, for example - neural networks don't work with data as such, the data presupposes an internal structure that is absent in an input from the standpoint of the network itself. It is it's job to covert that to something we can reasonably call "data". Moreover, this knowledge is encoded in it's internal state, essentially being the "interpreter" bundled in. Another angle that I like to think from is this: TRIZ has a concept of an ideal device, something performing it's function with minumum overhead required, best that the function be performed by itself, in absence of any device. If we imagine the computer (in a very generic sence) to be such a device, it stands to reason that ideally it will require minimum, or even no input. Obviously it means that we don't need to encode meaning or interpretation into it through directed formal input. The only way for it to happen is for a computer to have a sufficiently complex internal state, capable of converting directed, or even self acquired input to whatever we can eventually call "data". This logic could possibly be applied to some minimimal object - we could look for a unit capable of performing a specific function on a defined range of inputs, building the meaning from it's internal state. The second task then, would be to find a way to compose those object, provided they have no common internal state, and to build systems in which combination of those states would render a larger possible field of operation. Third interesting question would be: how can we build up the internal state of another object, provided we would want to feed it the input requiring interpretation further down the line, building up from whatever minimum we already have.
Sure, the message matters insomuch as it contains any information the receiver might be able to receive, but that doesn't guarantee it will be received, so how much does a message really matter? I don't see how the sender matters that much (unless perhaps the sender and receiver are linked, for example, they exchange some kind of abstract interpreter for the message). But does the message matter on its own if is is encrypted so well that it is indistinguishable from noise to any but one particular receiver? It's just noise without the receiver. I'm not sure what was meant, but this is the best I can do in understanding it.
data isn't the carrier, it isn't the signal (information), and it certainly isn't the meaning (interpretation). A reasonable first approximation is that data is _message_.