As a player that came recently from SWTOR (where everyhing is voiced), it felt a bit weird that most quest weren't voiced, but now i'm glad they don't. So many quests have so many useless walls of text, that add nothing to the world (please fetch my thing because reasons or kill X amount of monsters because reasons!), so therefor the cost of voicing them would just be a waste, they're fine as they are, even some MSQ are fine with just text (although some could indeed be better if they ere voiced).

In SWTOR it made sense that they were voiced since it was Bioware usual questing line, as your choices "influence" stuff. In FFXIV? not really, it's fine as it is, i prefer it like this.