I'm not promoting cars, just playin' devil's advocate. Why? Because generalizations are dangerous, especially this one!
Starting with two... Seriously, most people can't physically commute ~30-50 miles per trip, two trips per day, five days per week, and depending on where an individual lives, public transportation can be more expensive, if it allows the individual in question to even commute, since there may be a patchwork of irreconcialable schedules from different public transit organizations. Going car free is not always more inexpensive than having a car, or even doable. Even going ~30 miles RT can be out of reach for those people with jobs involving lots of manual labor. Riding two hours a day on top of working eight hours unloading truck tires or mixing cement just isn't doable.
As for one, I'm here because I support and indentify with some of the views held by most car free individuals, and because of this, I am very critical of generalizations and claims made by those members that don't use their noggins. Going car free, car lite, DIY, etc... I'm generally in agreement with. But it may not be the best for everyone, and it's certainly not some great movement that could lead to a significant reduction of GHGs, fossil fuel use, etc... Which is why I post up in threads that have these absurd claims. I'm harsh because I love!
I fear for what is a rational, appealing concept, when zealots start zealoting. It's kinda like jackasses on CM rides, they cause more trouble than they're worth, with the end result being something that ends up even farther from the supposed goal of better relations with motorists. Sadly enough, in our polarized, poltical environment, people tend to look to those who are "right" (ala "Thank You For Smoking") rather than those who are looking out for their best interests. Along these lines, zealotry can easily discredit an otherwise good idea in the eyes of "Jane or Joe Public" because it's easy to show the zealot's statement/stance is absurd...
That is to say, be careful what we say. A small slip can discredit any rational idea in the eyes of others because most aren't rational.