As for what I want, I want generative AI banned entirely,
Well, you can see the moral (and political!) problem here. Maybe the people who crunched numbers before electric computers wanted them banned. Maybe people who make diesel engines want EVs banned. That's asking the public to take a hit for the benefit of a small group. Morality aside, it's politically unlikely.
or at minimum restricted to training on works that are either in the public domain, or that the person creating the training model received explicit, opt-in consent to use.
This is somewhat more likely. But what then?
I'll start. Opt-in means that you have to obtain a license to AI train with something. You have to pay the owner of the intellectual property. What does this mean in our economy? What happens?