I don't know what the process is for matching voice actor to book, but that process is inherently constrained because the voice belongs to a real human, and I enjoy the output of that process.
That said, while Audible is kind of expensive, I'm afraid that they'll reduce their price and move to robot voices and I'll lose interest entirely despite the cheaper price.
Frankly I like the arts strictly because they're expressed by humans. The human at the core of all of it makes it relatable and beautiful. With that removed I can't help wondering why we're doing it. For stimulation? Stimulation without connection? I like to actually know who voice actors are and follow their work. The day machines are doing it, I don't know. I don't think I'll listen.