No offense to the citizens, but USA is a failed Capitalist experiment. Nothing really works optimally, or even close to it. Everything is backwards, wasteful, unjust, non-free, anti-democratic, and in general several hundred years behind more mature nations…
Europe had an advantage on designing walkable cities by building them when there wasn’t another option.
Much of the US was settled by cars and air conditioning.
To quote Not Just Bikes: “the USA wasn’t built for cars, it was destroyed for cars”
Most cities in the US were walkable and public transport oriented, but in the fifties all livable neighborhoods and city centers were bulldozed to make place for parking lots and arterial roads.