Agreed. I think the framing of "stealing" is a needlessly pessimistic prediction of how it might be used. If a person owns their own likeness, it would be logical to implement legal protections for AI impersonations of one's voice. I could imagine a popular voice actor scaling up their career by using AI for a first draft rendering of their part of a script and then selectively refining particular lines with more detailed prompts and/or recording them manually.

This raises a lot of complicated issues and questions, but the use case isn't inherently bad.

The problem is not about replacing actors with technology. It is about replacing the particular actors with their computer-generated voice. It's about likeness-theft.