Practice your cycling skills. Cars make our body like jelly. Would you like to pay your hard-earned money to become...overweight? Nope. If you're afraid of getting in a really bad situation, just buy the cheapest car you can find. As for the "great things" the GTI gives (spirited driving etc), come on...bodies are for exercising them. Watch your waistline instead, it's safer and its called living.
On a more serious level, sat navs are a valid and enjoyable part of the ownership experience. Yes it's not driving but that is multi faceted and it is easy to reduce these different facets if you wanted to.