In an interview with Polygon, Aonuma commented on the addition of voice acting and technology in Breath of the Wild. They added voice acting to leave more of an impact on the player on specific scenes. Technology was included as an interesting juxtaposition to the natural setting.
“It’s really difficult to leave an impression on players with just text. It’s not that I made everything voiced. But I have these moments where I want to leave impressions on users. I add voice there.”
“If Link said something the user doesn’t agree with, that relationship between the user and Link would be lost. That’s why I chose not to go with that.”