Clearly they wanted something reminiscend of the film "Her". Since Scarlett Johansson didn't want to do they voice they hired someone else. The voice they used is that of their voice actor, not Scarlett Johansson. She owns her own voice, but I don't think she has any rights to voices that merely sound like hers, when they're not being used to fraudently imply that she's involved.
So movies are really influential on culture, and I think there should be broad scope for "taking inspiration" as long as it stops short of plagiarism. Think how many works you've seen that are obviously heavily inspired by e.g. 2001: A Space Odyssey. I don't think the vibe of "I'm sorry Dave, I can't let you do that" as belonging to the voice actor Douglas Rain, or Kubrick or Clark. And that's what a good thing! Producing cultural works must feed the production of future works and I'd like to permit all but the most blantant ripoffs.