Quality is a real issue. You see not having voice work in an RPG isn't that big of a deal. I've played more RPGs without voices than I have with.
However having an RPG with bad voice acting can ruin an otherwise amazing game. Bad voice acting can make a badass character laughable, it can make a funny character stupid, and it can make a evil character sound like he gets his kicks from horribly awkward one liners.
There's nothing worse than hearing a character's voice and realizing it doesn't sound anything like you imagined in your head.
