Earlier quoted context omitted.
People, especially couples, moving out of cities as they get older has been a thing for decades. You’d think young urbanites would welcome this.
It means heavy car dependence unless you expect people to change careers when they have a family. Hence the modern American cityscape, with most the population spread out amongst suburbs.
And, yes, outside of Manhattan and young people essentially living like they did in college for a few years, car dependency is just what most people do.