It's important not to conflate "suburbs" and "rural."
For example, most of the Santa Clara Valley is suburban, consisting of subdivisions of detached homes with front yards, driveways, garages etc. But the area is definitely not rural: millions of people live here and 4 of the 5 FAANG companies are headquartered here.
You could say similar things about LA, or the areas outside Chicago and NYC, etc. They are definitely suburban, and definitely not rural.