If you work at height, the regulation decides this for you, not your employer and not your own judgment about whether you feel safe.
BC OHS Regulation Part 11 sets out when fall protection is required. The course covers that threshold directly, because most of the arguments on a jobsite come from people who are honestly unsure whether a given task crosses the line.
You also need to know which system to use once you are past that threshold. There are four fall protection systems recognised in BC, and they are not interchangeable. They sit in a hierarchy, and picking one lower down the list when a higher one was available is a finding waiting to happen. The course works through that order and why it exists.
Guardrails and control zones get the same treatment. A guardrail that does not meet the construction criteria is not a guardrail. A control zone without a safety monitor meeting the requirements is not a control zone. You leave knowing what makes each one count.
This is the course for anyone working at height. It is also the course a supervisor should take before they are responsible for deciding how a crew gets protected.