DR2K
Banned
They should offer voice acting DLC. You could think of it as the book on tape version.
Reading is something that is taken with great pride in Japan and dialog heavy RPGs are a part of that reading culture. You shouldn't expect voice acting in Dragon Quest.
You can read and listen to dialogue at the same time. They're not exclusive concepts.
Last DQ game I played had voice acting... and it's 2017 and on PS4 so I do have expectations of VO. Most people should.