This is assuming that your car trip starts and stops conveniently with available parking right at the point of departure and parking at the point of arrival, and that there is non-delayed traffic flow precisely at the right time. In practice that's not the case and those time add up quickly. This is also assuming that with a car you never have surplus times, such as filling up gas, taking breaks from driving yourself, and let's not forget about maintenance, while we're at it.

Don't get me wrong, I often prefer the car, but that post is comically one-sided.