Advice addresses one or two parts of a system in flux. Motivation, habits, beliefs, understanding, experience, skills, etc. then a variety of issues appear to happen to the system. In reality, a lot of what "happens" is predictable based on the system, poor sleep leading to mistakes, etc, but it appears to the person inside the system to be a complex machine on a moving playing field. People also greatly misunderstand what is required to effect change, as simply as poorly realising Murphy's fifth law, "Before you can do something, you must do something else."
