Part of using Word to communicate is to give a document clarity of layout. Some of the message is thus sent by design.
I had a document from one of my team leaders that needed some content edits, and it was quicker for me to get into it and do them myself. Nothing dramatic, so no real coaching opportunity in it.
The document opened I couldn't quite see how it was constructed so I turned on markings--and what a mess!
Instead of using Word's tools like tabs, tables and cell positioning, paragraph layout, my colleage had used the spacebar...for everything. Move one piece of text and the whole line is thrown out, move another and the vertical order is wreaked.
A real step back in efficiency.