In this specific case with Randy Travis it’s a touching moment because of his long established success as a singer and the relatively recent tragedy of him losing his voice. It feels on the surface like something was given back to him, but even that is questionable. In general, though, this removes the humanity from the performance which is important if the goal is to have art created by a human. Imagine a different scenario, if you had a famous painter who became paralyzed and then a computer-controlled prosthetic was created to move their arms/hands and try to mimic their style. The authenticity of the art gets lost in the process when it’s no longer the artist but a programmer mimicking the artist. It may be a very passable counterfeit, but still a counterfeit.