A voiceover is thirty seconds of work that requires a person, a room and a schedule. So the overnight update waits until six, the online version of the package goes out mute, and the second-language edition never gets made at all — not because anyone decided against it, but because the booth was locked.
Voice Studio is for the reads that never justified waking somebody up. It is not a replacement for your presenters — a channel's identity lives in the voice, and nobody should want that automated. It is for the timing track on a rough cut, the overnight web version, the fourth language nobody has staff for, and the two in the morning when a story will not wait until the shift changes.