Fresno (1700/sq. km) also has less than half the population density of Nantes or Nice (4200-4800/sq. km). It's not exactly a fair comparison if the area of the city is far larger unless the last-kilometer transit seamlessly scales to last-2km transit. You can actually walk to a reasonable number of places, or take a bus 1-2 km to many more, from a main station in Nantes, Nice, or any number of similarly-sized cities in many countries.