Why is it customary to put many closing parentheses on one line in Lisp-based languages?

Question

Usually code looks like this:

(one-thing
    (another-thing arg1 (f arg5 r))
    (another-thing arg1 (f arg5 r)))

Why doesn\'t it like this?:

Answer 1

Saving vertical screen (and eye) real-estate space is important.