I don’t think this will be a concern for long. Either the tech isn’t good enough and it lacks emotive nuance to the point where human is still preferred, or it is good enough and there is no point in basing off a human actor in the first place vs using an original wholly fabricated voice or appearance.

If the tech actually works well enough to stand in for humans, I think we will very quickly see recording real humans in fictional pieces as old fashioned.