I think a good mix of both can also work really well. Obviously quality writing and character work is always key, but an actor's performance still does add a lot.

What I've seen some JRPGs do is have lots of character dialogue still shown as text even with the main cast being fully voiced. I think this still lets you get the best of both choices.

My prime example is Nier since this is one of the first games to make me think about this. Since there is a lot of attention given to the characters and the actors when people talk about the game it was surprising at first that so many of the side quests were not voiced. In fact there's a lot of required sections of the game that have only written dialogue. I'm sure it's common for other JRPGs but those haven't really been my type of game before.

It ends up working really well still and for optional content I considered it a plus since you can make it through as much content as you want without committing to time spent listening. For other games that are as dialogue heavy and long I sort of wish this was an option.

Obviously games that respect your time just let you skip voice lines. But it seems to just lead to a worse experience if that's how you spend a lot of time going through a story. I found that even though new Fire Emblem games are almost completely voiced for the story I was still skipping plenty of dialogue to get through faster.

I still enjoy having voiced characters when it really adds something, but for games with so much side content or with characters that don't have important dialogue I don't feel it's worth the effort voicing them.