I can see why SAG/ASTRA, or voice actors, aren't going to like this technology, but it doesn't feel all that different to any other industry swept away by tech, whether that's farming, horses and carriages, mining, etc. In other words, I can see the negative economic impact it will have on some people, which we may (or may not) want to protect via legislation, but I don't see how it escalates to a moral question.
"Disrespectful" to me is flipping off David Attenborough, not getting a computer to amusingly narrate mundane things in a decent facsimile of his voice.