Prevents Wrist Pain

Pain while typing is not necessarily from "carpal tunnel syndrome". A more common ailment is tendonitis; when tendons in your arm, wrist, and fingers become inflamed and begin to swell. Part of the cause of this comes from bad posture or inferior hardware. But the reason you are using the computer is to type... and type often.

Using an text expander can reduce the amount of time you spend typing. What you want to do with that extra time is up to you?