Besides, it's already pretty unambiguous that weights are not copyrightable: they're a result of a mechanical process. The only original creative input that goes in to the weights is the unfathomable amounts of content scraped from other sources that aren't the authorship of the models. The objective of the gradient descent is simply minimizing loss on the training data.
Facebook doesn't own the llama model weights any more than the Bridgeman Art Library practically owns the paintings of European masters because they made quality scans of them. ( https://en.wikipedia.org/wiki/Bridgeman_Art_Library_v._Corel.... ), or any more than Rural Telephone owns the phone directory ( https://en.wikipedia.org/wiki/Feist_Publications,_Inc.,_v._R.... ).
Trying to make model weights copyrightable is going uphill, and I don't see how you get there without first establishing that the these LLM are unlawful derivatives of a countless number of copyrighted works along the way. Doing so would probably create a immediate monopoly for legally created LLMs for the hand full of corporations with quasi-monopoly content hosting services (facebook, google, etc) that can (and/or already have) stuffed licensing into their terms of use.
Do you want a cyberpunk dystopia? I think creating an AI monopoly is how you get a cyberpunk dystopia -- and the two ways we end up with one is either outright restrictions on private development of AI like some have been lobbying for and the other is the extension of copyright so that only a few entities can get access to enough of other people's data at a low enough cost to train them.