Why do people use their GPS to get to familiar places?

People that turn on their GPS to go places they've been to a million times just like listening to some strange woman direct them where to go. Even when you know she's wrong, you still listen to her. If she gives you the wrong directions every time you go to a particular place, why do you insist on turning her on every time you go there? Do you think she is eventually going to get it right? Irritating!