Spontaneity is fine but we need facts to design targeted training. Folks involved in designing training, whether they be students, Newbies or clients, need a framework - the big picture. ISD models provide this. Analysis, design, develop, test, deliver, evaluate explain what training is. They help stakeholders communicate effectively.
Analysis generates much needed systematic thinking.
In my view, rigorous, analytical thinking originates or finds expression in a systematic or ISD approach to crafting courses. I suspect you did the same type of analysis in your EnergeX intervention described in your article. Linear, discreet, terminal, sequential, one SME-driven. This should not happen. That is my point.