RickCorey said:They [manuals] should be written by a NEW USER who JUST NOW figured out how to do it right. Then that NEW USER can write in terms that NEW USERS would understand.
Only if said new user is proficient in technical writing. This is rarely the case, and what will happen is that key steps/information will be left out. The "student" will be stuck, with no recourse. The other "problem" is that with cameras, much like computer operating systems (e.g. Windows), there is often more than one way to produce the same desired effect. The method presented may not be the best one, and not offering other viable options is a disservice to the camera owner/student.
On the other hand, with verbal teaching, such missing information can be rectified on the spot. Questions can be asked.
