> Similarly in Lisp, (a list-oriented language) both functions and arrays are lists.

In which Lisp? Try this in Common Lisp and it won't work too well:

  (let ((array (make-array 20)))
    (car array))

To quote John McCarthy "Since data are list structures and programs are list structures, we can manipulate programs just like data."

Yes, I know most people consider it to be a functional language, and some variants like 'common lisp' make that more explicit, but the original concept was markedly different.