That doesn't really change his overall point about convenience. Have you ever actually had to take public transit on a regular basis for anything? I have. Even stripped of all other considerations it's more time consuming by far. A roughly ten minute trip by car can take 30-45 minutes down the same stretch of road depending on how many people are getting on and off and how quick they are. Particularly if you're unlucky like I was and the bus detoured a few blocks before my stop to a train station, leaving me picking between walking a few extra blocks and crossing a major road, or waiting an extra 5-10 minutes to get to the stop closest to my house. Similarly what's a 20 minute trip by car can be a 45-60 minute trip by subway once you factor in walking to and from the train and waiting for a train, and that's even with one destination being right by the subway stop.
For that matter, even with gas prices being what they are nowadays, driving is likely also the cheaper option for the distances involved in city transit. Any car that gets a reasonable amount of miles to the gallon will mean you're spending less money on gas used by the trip than you would be spending for the bus/train fare.
All in all, public transit is for people who for some reason cannot use a car to travel to and from their destination. Traveling by mass transit only really begins to make sense for the individual for long haul trips where it may still make sense.