That's true for writing code, but I think the man benefit is when you're reading it. Parenthesis tell me that there is a function application occurring, and square brackets tell be that bindings are being initialized. Then parenthesis, square brackets, and curly braces help me easily find lists, vectors, maps, and sets just from a quick visual scan of the code. Clojure also does a nice job of eliminating unnecessary parens, such as the ones surrounding pairs in a let binding. So instead of this:

  (let ((x 1)
        (y 2))
    (+ x y))

In Clojure, it becomes:

  (let [x 1
        y 2]
    (+ x y))