Your car is an extremely heavy, extremely fast machine that will crush anyone unlucky enough to be in its path. That includes not only incompetent/incapacitated/elderly drivers, but also dumb accidents and unaware pedestrians. You will easily kill a child who tries to play in her suburban street even if you go 10mph -- not because you're a drunk, but because American structural design forces everyone to drive two-ton bullets to go anywhere, which inevitably results in lethal wrecks. Compare Denmark's road fatality rate of 3.0 per 100,000 inhabitants versus the US ratio of 11.6 per 100,000. [1]
The question is not whether you enjoy driving. The question is why cars are entitled to the vast majority of public space -- not only for parking (often for free or nominal fees), but also for individual transportation that endangers the lives of pedestrians and cyclists. Please take a look at this illustration to get an idea of how much land your car takes from everyone else. [2]
Do you really think a kid trying to bike to school should have to risk his life every day... because you feel entitled to barrel through his home town?
[1] https://en.wikipedia.org/wiki/List_of_countries_by_traffic-r...
[2] http://www.vox.com/xpress/2014/11/18/7236471/cars-pedestrian...