I grew up in a suburb of Chicago. I could walk to two grocery stores, but each took 30 minutes each way. I also grew up across from both my grade and middle school, a horse ranch, a gym, and a massive park.
I loved my childhood because we could play full field soccer games, rugby, football (American), etc. However, if my parents wanted to get anything you had to drive.
Most people on HN don't appear to realize what it's like growing up or living outside of the west or east coasts of the U.S. or Europe. It's not that it was built for cars, it was built for farms and agriculture, nothing is wrong with that either.
We had a forest behind our house, a soccer field where we also played bandy in the winters, 10 minutes walk to the horse range, a golf course that also was used for cross country skiing in the winters, 5 minutes to the commuter train that took you to the city center in 15 minutes, lakes we swam in the summers and ice-skated in the winters. Markets for food within easy walking distance and a decent mall within easy bicycle distance. I bicycled everywhere when I didn't use public transport. I didn't even bother to get a drivers licence until I was a bit over 30, and the only reason I got it then was because I was planning some long holidays in the US. You don't need to center you society around cars and driving to have a very high and pleasant standard of living.
Currently in Brazil the laws about import cars are extremely draconian, and taxes are overall sky high, crappy local made cars are frequently 2 times the EU or US price of the same, but higher quality model.
People still get in terrible debts, paying sometimes interest that totals several times the principal, to buy cars anyway, not because they are useful, but because frequently they are the only choice. For example in Rio de Janeiro, because of the Olympics, the government deliberately canceled public transportation routes connecting poor areas to the touristic areas, forcing people of poor areas to use cars, specially because parts of the route are impossible to cross on foot (mountains with no hiking trails, with the passage being road tunnels)
Or that for the world cup, the government declined several train proposals in favour of making "light train over road" routes, where you just build gigantic roads on pillars and place buses on them.
The entire government apparatus spent decades and untold fortunes making the car the fast and flexible option. We now have the benefit of hindsight that tells us it was a massively inefficient use of public funds.
That's the most ridiculous justification I've heard for anything. A thousand dollar piece of toilet paper is also massively profitable to produce, but nobody would buy it. People buy cars because they are useful.
If you think most people don't enjoy the freedom they get from owning a car, you are living in a bubble. I work with people that could take the caltrain and get to work faster, but they still choose their car because of the flexibility in schedule and destinations it gives them.
Also, walking is not the lowest common denominator if you have a job far away, have small children, or have a disability.