Dominic Meyrick made a good point in his article arguing that lighting design needs to be taught in universities and colleges similar to fashion & interior design, or product & textile design courses.
In my personal opinion, I treat lighting design & application compared with other fields or profession like walking into a big city street, then lighting design is just a small alley but once you get inside this alley, it leads you to another bigger city. Lighting combines science and creativity, technical and architectural in a beautiful mix that you can actually see and feel.
Well-planned lighting gives increased accuracy and performance for workers, safety, well-being and sets the right mood for the occasion. The world will be such a boring and unsafe place if there are no good lighting designers.