System Wide Feature Disabled within Pages?

I just read an article on some tips and tricks and such in OS X. Nothing really caught my eye till the end where it showed there is a "Built-in Word Completion" feature that seems to be system wide. I had never even heard of this and thought it was great and I quickly tested it in many of the apps I use regularly. Then I noticed something weird. While it works in something as insignificant as the "google search bar" in Safari, it DOES NOT work in Pages! This feature is effectively disabled in APPLE'S new word processing app. Does this even make sense? Try it out, see if it works (and if your like me, for the first time. its a pretty cool feature).

Thoughts?

 

Ok, but why would Apple of all people disable such a feature? That is the source of my pondering.

 

Tru, it has cool all over it, but I think it has very little use other then those one in a 1000 moments, but nice to have. Hopefully in the future, this feature will show up usable. I just find it odd that Apple would 'disable' it's own features.

 

how so?