I think the main issue is the really subpar, most of the time even brain-dead, writing. Look at stuff like the Soul Reaver games, Planescape Torment or Vampire: The Masquerade - Bloodlines. They are also fairly word-heavy, and not once was I bothered by it; in fact, I think they are written well.
The issue discussed where the protagonist is talking to him/herself as a diegetic way to help players navigate the space is just an example of brain-dead writing. Most game "writers" are, unfortunately, just some retards who wrote a Tumblr blog and got employed by nepotism. Not one of them has ever read even one play by Shakespeare or can talk about the narrative structure of The Odyssey. You know, basics you should know if you are serious about writing.