It's because the design is driven by development companies with profit-motives.
Blaming BigCorp seems misguided when we practically begged them to build it this way. It's like walking into McDonald's, ordering a dozen Big Macs, and then complaining about how McDonald's makes you fat.
They also have to contend with larger local populations, often with a stronger political voice. It's also more capital-intensive and planning-intensive to build in a city than to plop down the same McMansions on cul-de-sacs outside of town, so there's a lot less uniformity. So the answer to your rhetorical question is no, not like suburbia is.