Travel time is travel time, you would have a similar tally on the train/bus/walking. This isn't really the best argument against cars because people buy cars because it's a massive improvement on "waiting for the bus time."
I don't really understand this statement. Do you genuinely think that there is no difference in QOL between a 30 minute drive on a packed freeway vs a 40 minute walk on pleasant streets? Personally, I'd leave 10 minutes earlier and choose the latter every time. Even better, walking time is remarkably consistent. On foot, I essentially never have to worry about my travel being disrupted by road conditions which means I know when I arrive based on when I leave which is not the case at all with driving which has a much higher variance.
Time on the bike or walking is time spent improving health and well being. Time on the train can be productive, relaxing or entertaining. There is an enormous difference between these and the stress of driving.
It's really not. You can actually do stuff waiting for the bus, or riding the bus. You can't really do much while driving. Walking is incredibly good for you, unlike driving.