Imagine it the other way around. You would basically just read a text bar when you speak to NPCs.
That would speed up the game a lot and simply limit it to a few dialogs. The rest would then be less and less noticeable on the second, third and subsequent runs.
The result would be a powering through.
The focus would definitely shift to a different way of playing.
Now I have more of a feeling of immersion.
Just having text to read has been the case for decades and resulted in some of the most memorable RPGs on the market like Planescape Torment, Disco Elysium, Fallout 2, Baldurs Gate 2 or Mask of the Betrayer, all of which are far superior to BG3 in many aspects, especially the important story and writing ones.