I am on the road with many that would not or do not pay to take it, if not required. School curriculums are designed to meet the educational needs of communities and better prepare the students for life, providing necessary knowledge. I was never an elementary or high school teacher, but was skilled as an instructor. I can tell you from experience a regulated course in any subject in task produces better skills in the task on average, due to common task, condition and standards, than what is picked up without properly layed out training. This isn't rocket science.