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

The parentheses aren't there for readability, they are there for the computer. The programmer can see where the block of code ends by looking at the indents. Furthermore, having multiple closing parentheses share a line means the programmer can view more code at once on the screen.