This is clearly the future despite the outrage here.
There are at least 389 living languages with over 1M speakers. That alone means it's impossible to reach some people and they get left out. Most of these languages dont even have enough professional voice actors to cover the bandwidth.
There are thousands of books released every year. That's impossible to cover even in English alone.
Its an objective net good to have more accessible audio books and the privileged people who do care about this stuff can very much afford to vote with their wallets for non-ai voices.
In fact since AI moat is so minimal this will very quickly be adapted by open source solution providing audio book access to millions if not billions of people to whom this was not an option. Its amazing.