[furiens]

You certainly find this kind of thing in numerous beginner books, but I’m skeptical that it’d be of much use for complex scores, or for someone with mastery of sight-reading. We don’t tend to do the same for text, after all. That said, it is easy enough to miss a dynamic marking and plough through a section at the wrong volume. That one might be worthwhile!

[solarmist]

I'd say that due to tradition/expense rather than lack of value.