Sure, but in the case of the copyrighted work, we're talking about a specific combination and sequence of numbers which represent that 2-D image. The numbers here representing the weights that make up the model have nothing to do with those.

Yes, I agree that there is an argument to be made here, just not on the basis that the model is 'just a matrix of numbers.' Of course, when we're talking about this many weights, one must wonder exactly how much of the input images is actually pretty much directly encoded in the resulting network.