Are you suggesting that when poor people get cars, they are better able to drive to work, then make more money? Because that is my take-away from this
So, I am suggesting a car is considered a luxury or unaffordable by large segments of the poor population outside of the largest and richest cities.
Poor people who can’t currently afford a car are hardly going to buy a new one, so at best you might start to change things for them a decade from now. Improving transit doesn’t have that delay or all the knock on affects around new car regulations.
Mass transit meanwhile can actually solve the root problem even in rural areas. Hell, America already has mass transit driving past almost every home in America 2 or more commonly 4 times every weekday day for most of the year, their called school busses and they don’t charge their users or cost that much to operate. I am not suggesting we should have free public transit to every home, but it does suggest far more is possible than is currently being done.
Dallas Texas where 10.2% of households live without cars has a 18.9% poverty rate, median income of $52,580, so it’s larger, wealthier, and denser yet has significantly more cars.
Also, 20% is unusually high. Nationwide it’s about 8.7% and that’s heavily influenced by NYC. Excluding just NYC and that number falls closer to 7%.
PS: It’s really region specific but in general the wealthy are more likely to own a car in their area but different areas don’t have anything close to the same breakdown. https://slate.com/business/2019/05/maps-car-ownership-income.... Just look at El Paso vs San Jose on the bottom graph.