You're mixing different issues. Your exact quote was "This is going to be awkward for the incentive to generate these models which are protected by the same rights".
Except right now models are being released openly, with anyone being able to download and fine-tune the weights. Yes, they have licenses, but it's not like the licenses protect some core part of their business models. Whatever incentives they had to release those weights, they would mostly have the same incentives if copyright law disappeared overnight.
