Neither source just simplistically says "it's the fault of cars", both are deeply thought-out perspectives on what is really going on. It's not just cars, it's certain engineering and bureaucratic decisions that were made around cars. It's also the scale of development, i.e. governments that are set up to work with large-scale developers and are too hard for small-scale developers to deal with, and the general trend toward all-at-once top-down development, and I could go on and on. StrongTowns has successfully diagnosed the entire systemic pattern. It's not just blame-the-cars.
Check out the actual resources, don't just assume they are only the simple thing the poster had to say to make any point at all.