Training courses are artifacts of a time when resources were scarce and connections were few. That time has passed.
The roots of training are to get a lot of people to do the same thing competently. The Roman army trained soldiers for battle and many other duties, like building roads. Standard methods were developed. Drill and feedback over time helped to develop competence. But the modern training field exploded after 1945. Large organizations created training departments, now called ‘learning & development’ or some other variant, but still focused on one thing: looking backwards. Training looks at how people currently do work and then gets others to replicate this. These are described as competencies, made up of certain, skills, knowledge, and attitudes. The assumption was that what works today will work tomorrow. The training department assumed the status quo.