I agree with you up to a point. However, make no mistake that there is a significant difference between a car I don't have to drive and the modes of public transit you have cited. To wit, a car (driven by me or a computer) will take me directly from A to B. No walking, no changing lines, etc. Aside from the fact that most people are incredibly lazy (I'm including myself in that number) the difference in time and convenience is significant. Yes there are cities where that difference is quite small (NYC, London, amongst a few others) but these places are very much the exception and not the rule.