In this specific case I am okay with and happy with AI being used this way since the subject being impersonated themself wished to be voiced by the AI. I can totally see why, it’s like technological magic that “gives your voice back” and you can sound like yourself from any point in your recorded lifetime you like!
For deceased people I don’t think AI should be used to put words into people’s mouths for commercial purposes without their permission. When AI gets good enough, why hire new actors for a movie when you can just reanimate Michael Jackson forever? Hee!