You give up a portion of your life in exchange for cars and a car centric civilization. And I guess for most people they think it's worth it.
I have no idea about Japan but I live in the city and I can drive for an hour and be far enough from civilization that if I don't return I might never be found. Indeed unless you consider an urban park to be adequate, a car - whether owned, borrowed, or rented - will get you much closer to actual wilderness than transit ever will. Ironically car centric culture can actually get people closer to nature, should they choose to do so.