They could have. But as I also noticed with the person that has been doing the Narrated Puritan for 30 or so years. They seem to be paying tribute to the workers who have labored thus far, doing these recordings, prior to this technology; by using their voices as a way to commemorate them. Like the gentleman for Spurgeons Sermons, and the gentleman of the Narrated Puritan for Puritan books. Before this tech, the guy that did Spurgeons Sermons did 500 over 30 years. The Narrated Puritan guy has done over 2,000 selections in the same amount of time, though not full-length books. With the AI tech, they can take their voices, and have it read the text of how ever many books or sermons they wish to dictate from now on.