Sure it is. With voice acting, you can't have the sheer quantity of dialog that you could if you just used text. Voice acting takes time and dollars to produce.

Sure it is. With voice acting, you can't have the sheer quantity of dialog that you could if you just used text. Voice acting takes time and dollars to produce. Text takes way way less of both, which results in allowing you to have a lot more of it (see: Morrowind vs subsequent games).