With all due respect, the number of people who live in cities as dense as Tokyo are the minority, most of us don't.
However, when I think about loading up my young children with all of their stuff, loading me up with everything I need, etc, and then dragging that down the street a quarter mile, then waiting for the bus, boarding it, riding to the transit center, transferring, riding another bus to the light rail station, riding that downtown, and then doing it all again the other direction... well, I'm pretty confident in my original point that the car is a hell of a lot more useful. Sure, you can exist with only the public transport option, but I was not asserting otherwise. But a lot of people on HN seem to think that not only is it possible, but that it is the superior choice.
So, no offense taken, in fact I appreciate you affirming my original comment about so many folks on HN commenting from the viewpoint of someone with a young, uncomplicated life :-).
As it is those with cars push off these negative externalities onto those who choose not to have them, or can't afford them. So your comfort does have a cost, which you don't pay directly.
Also, tour last paragraph just makes you sound pompous and liek you have no intention of having a discussion but instead only wanting to put others with a different point of view down.
No, if these are big issues for you, you likely live in an American low density area where public transportation is scarce. In large metropolitan areas (which is after all, where most of the world already lives, and will live), getting on and off public transport is usually not a problem.
I have relocated to Tokyo for example about a year ago, and for me, a trip to the grocery store is usually done by foot (same is true for other appliances), and multiple forms of public transport are in walking distance.