It's not "just" close together like it happened. The US has made it illegal to build human-scale dense neighbourhoods for 50% years.
Parking minimums, density restrictions, street width minimums, LOS (level of service) planning, etc. all combined to make the US an unwalkable, uncyclable, unenjoyable place to be a human. As a reward the US gets about 35,000 people a year killed by drivers, and many many more indirectly through lung disease, cancer, obesity, etc. as well as parents terrified to let their kids ride a bike.
Lots of free parking though.
This is a fantastic series illustrating the effect of urban design policy in the US