Why am I obsessed with cars? Because my crappy 35 minute commute by car becomes a 2 hour 20 commute by BART + Bus + walking (according to Google Maps). And trains can't take me to the hikes or parks I like, aren't really a practical way to bring around my kid and all the random shit he needs, etc.
I suppose we could bulldoze the entire Bay Area to organize it around a train system, but that's not going to happen.
Good username/comment synergism, though. I will say that even in NYC, taking the subway to go between my brother in North Brooklyn to my friend in South Brooklyn is like an hour, even though they're just about 4 miles away. Even NYC needs cars, although it makes more sense to use Uber/taxi for many people.