Why can't they just use whitespace like Logo or Python?
I guess then they'd be complaining that the lack of parentheses is confusing LOL!
The readability of your source code should not depend on the editor used to view it.
Lisp code can be just as readable as C, Ruby, and Python. The only thing stopping it is a community adopted convention, and I find that both sad and disappointing. Lisp is a beautiful language, so why make the structure of its code unreadable?