Why would you say that?
Because now we have our smartphones to do that! We all have phones whose nav system is way better than what the car has to offer.
I agree. Car's nav system is old news. Most of them are not as good as the phone's navigation. And the car company a charges a huge amount just for this feature. I hate that some manufacturers force people to buy the Nav system by packaging the high-end audio package and nav package as one.
The general trend now in the industry seems to be not making a "nav" systems per se, there are actually the "infotainment" systems. In this system, you get apps like Pandora, a backup camera, Bluetooth wireless, voice communication, weather reports, internet access, and so on and so forth. They really do quite a bit more than simply get you from point A to point B.
Of course, if a car offers only the "nav" system, then I agree with you too. It's not worth your money.