You need to make a 20+ hour game with, say 5 hours of actual talking plot where cut scenes happen and characters actually exist.
When you're in game development, things get cut and added all of the time (when you have to make it in two years or so, the quicker end of game development). So, you have a plot that goes A->B->C->D where everything makes sense and works. Buuuut, you get told to change C to E because the game devs learn that the level they were building for C just wasn't enjoyable and they wanted an E section instead. So you change the plot and characters around so E makes sense. Then when you need to write and make the characters make sense for the story, but you need to do it with a whole bunch of time to spare because you need the voice actors can actually read the lines. Also then they need to be added to the game, lip sync with the game, and set everything up right. This takes up a whole bunch of time. So then when that time comes, you need to scrap part B because it wasn't working out, and you just need to produce the damn game. So now it goes A->E->D, and it still works, it's just sort of shit and uninteresting.
But, if you didn't have voice acting, you could spend more time refining the story, and adding better word choice, and adding extra dialog options into it. You can just do straight up more story and make it more interesting and a reason why people actually like it.
None of it is true. What you stated also doesn't happen. ---