How wise/necessary to add power steering?

The only time a non-power car is hard to steer is when you are trying to park it. Or any other time the car isn't really moving. Once you get moving, they are great to drive. But, most ladies will probably want p/s, plus anyone with strength problems, or arthritis. I have a bad shoulder (rotator cuff), so adding p/s to my Dart was a "must".