You make a solid point, I’d only say you’re overestimating a marginal cost of a minute of travel. Unless you’re doing a long freeway trip (which is unlikely in the context of going to Target), your average speed will be closer to 30 mph. That means that you’ll burn less than 2 gallons of gas (closer to 1 in fact) per hour, and even at today’s gas prices, that will come down to less than $.15/minute. Maintenance and amortization, as a good rule of thumb, are around equal to the cost of fuel, so you’re unlikely to reach $.40/minute, much less $.60, unless you drive expensive, fuel inefficient car at highway speeds for extended periods.

The rest of your comment, however, I fully agree with.