I don't know, man. If a big truck is hurtling towards me, I'd prefer that the person behind the wheel not have the cognitive impairment that prevents them from being able to grok the visual structure of:

  (+ (* 3
        (+ (* 2 4)
           (+ 3 5)))
     (+ (- 10 7)
        6))

It's just very basic recognition of shapes suggested by incomplete contours.