That started as a good counterpoint. But you need to understand how something works to be able to draw a cross-section from scratch. It represents a truth that

That started as a good counterpoint. But you need to understand how something works to be able to draw a cross-section from scratch. It represents a truth that is not otherwise visible. Even to draw a basic diagram, you must understand what is at stake. What an idiot savant draws or paints, no matter how realistic, is a very different job.