I think you misunderstand something. The same thing many AI enthusiasts and critics often choose to not understand. Regenerative AIs aren‘t just born from plain code and they don’t just imitate. They use a ton of data as reference points. It’s literally in the name of the technology.
You could claim „well maybe they used different voices and mixed them together“ but that is highly unlikely, given how much of a wild west approach most regenerative AI services have. it‘s more likely they used protected property here in a way it was not intended to be used. In which case SJ does indeed have a legal case here.