Yes, but I'm imagining TTS users still manage, don't they? What I'm getting at is that I don't think quotation marks are as important for comprehension as some make it seem. Instantaneous comprension
at a glance?... certainly. No question. And if you (rhetorical) think of the text as nothing more than a delivery mechanism for narrative, then I can perfectly understand how you might find a lack of traditional dialogue indicators annoying -- or even a roadblock to your objective.
I had more, but I think "I understand" is always a good stopping point.