Because model output is probably far closer to software or a licensed work which possibly has greater protections than it is to copyright. There is far less possibility of fair use, it might be protected by patents, license or reverse engineering laws.
In any case the laws are being written now, but I doubt these will have worse protection than software does, which has far better protections than copyright
Why would this be the case. Why would software output from a model magically have greater protection than the software the model trained on.
Let's assume model output can be claimed by copyright or some form IP. You can't really patent it, as the output isn't a novel idea or process, much like you don't patent a book or a movie. But for arguments sake, let's agree it is some kind of IP.
Who are you saying owns that IP? The people who trained the model? The people who ran the model? The people who wrote the prompt? The person who paid for all of that to happen?
If the model output is owned by the person prompting it and paying for the tokens, what's the problem here?
If the model output is owned by the trainer of the model, that's a big nasty can of worms.
> I doubt these will have worse protection than software does, which has far better protections than copyright
Software is protected by copyright. Some software may also be protected by patents, but last time I checked, AI generated output of any kind was not patentable.