Hi @PintoBean. 
I don’t think it comes up very often. 
In my experience, the majority of post revisions are for typos, fixing links, and those kinds of edits.
In the example you shared…
…if the admin users on your forums keep doing this over and over, it may indicate they need training to understand how to prevent sharing sensitive information.
I would guess that most communities won’t have admin users populating post revisions with inappropriate information and, therefore, the system works well as is.
Does that make sense?