Did you try clicking on that link, and reading the content? Pay special attention to the bold words:

The -> notation suffers from neither of these disturbing ambiguities, so we recommend you use it exclusively.

Of course, I know the limitations of Indirect Object syntax. Maybe I shouldn't use it in sample code for newbies, yes, but WhiteBird is an abbot. And please please don't call the thing "dreaded" because it is not.