Printing presses produce superior products.
A mediocre audiobook is certainly better than no audiobook at all, but it is an inferior product to a well produced audiobook.
That seems like a highly dubitable statement. Many hand illuminated manuscripts are masterpieces of art. The advantage of the printing press was chiefly economical making the cost of a copy dramatically less, not an increase in quality (especially so by the aesthetical standards of the time).
I love audiobooks but at this point, most of what I want to listen to is stuff that would not sell enough to bother having someone read.
There are also many voice actors who I simply don't like the way they read.
A future that I can pick a voice that I like for any PDF is a huge upgrade.
I think a problem people have is if on the young side, maybe didn't expect the future to change like this.
No one I knew went on the internet when I graduated high school. Change like this is all par for the course. The only advice I got in high school from a guidance counselor was that I had a nice voice for radio. Books on tape was not exactly a career option at the time. The culture will survive the death of a career path that didn't even really exist when I was a senior in high school.
Even current SOTA models would almost certainly be able to handle multiple speakers and pick-up on the intended tone and intonation.
Don't make the mistake of thinking what we have today is what we will still be working with in 5 or 10 years.
There will be curation and specialization. Previously ignored niches now will be economically profitable. It will be a Renaissance of creativity, and millions of jobs will be created.