That feels dishonest. Even if this AI is just as good at speaking as a professional voice actor (which I'm not sold on), a voice actor does more than just read the line. In ideal circumstances, they have a lot of context for what their character is doing and feeling.
Is this potentially a good option for saving money on video game voices? Quite possibly yes. Is there no compromise on quality? No, not yet.
Past that, the whole "Ethical AI" section's arguments seem ridiculous. Of COURSE it puts the livelihoods of voice actors at risk. Your product's whole point is that fewer man hours are needed for voice work. Just accept that you're making those jobs obsolete. There's a perfectly good argument that it's okay to do that. Throwing bullshit at us to convince us that "no, the voice actors will still have lots of work, and they won't even have to talk!" just makes you sound like snake oil salesmen.