That's a perfect example of "Apple thought of everything" except how well that feature is hidden from the user. I mean, who was the first person to discover that? And I'll bet money it was by accident.
To get simplicity sometimes you have to remove features, sometimes there's no way around it.
When you face the choice, to hide a feature instead of removing it altogether can be a good compromise. So it can be still discovered casually, it can spread by the word of mouth, blog posts, and of course the user manual.
When selecting text, would you, for example, put select-word/select-line buttons everywhere a text can be selected or just let people discover what triple click does?
The topic is debatable, I just wanted to say that this kind of choice does make sense to me, and probably many others.
