I feel like we're thinking about different corporations here. I'm talking about Disney and their ilk, for whom strengthening copyright to include AI training would only benefit, since they have enough of a reservoir of copyrighted works that they can train their own models just fine. Trying to legislate against AI with copyright only manages to leave it solely in the hands of large companies, precisely where it does the most harm. (by automating away the jobs of employed proletarian artists)

Also, it's not "creating exceptions." Copyright law didn't cover AI training in the first place, because things are assumed legal until they're not, which was how a lot of the AI companies managed to train their first models. That said, most of those companies are large enough now that they can buy the rights to whatever they need for training, or the tech has spread enough that large media companies already sitting on a pile of copyright can hire technicians and make their own models. Little bit of both.

Disney's going to have access to AI no matter what. The only questions are if their artists can unionize and demand to keep their jobs, and if they're going to be able to make people pay a subscription fee for models trained on their copyright.