Betty Edwards uses drawing not just to sketch or create works of art but also as a mode of thinking. It accesses the "right side of the brain," where things are not bound by logic, facts, past experiences or words.
She compares it to learning to read & write... you may be able to speak fluently, but if you don't read or write, your thinking is comparatively limited. Most people can see quite well, but if they don't draw, there's a lot they don't notice. Drawing on a regular basis can expand your awareness.
Sad to think that in some places art classes are being removed from schools. Perception, proportion, relationship, patterns, construction, point of view, "negative space" (the space around the problem...context) & wholeness are useful concepts to think with.