Presidential Selection by Lottery?

The latest on sortition from Italy. Not sure I see the advantage of having the head of state selected by sortition, and equally unsure why it should be so important to exclude anyone from the draw for such a (largely ceremonial and apolitical) post. More consideration of these topics seems appropriate.

http://www.internauta-online.com/2014/04/sortition-will-have-to-wait-for-a-great-leader-who-will-renege-the-ballot-democracy/