By row house do you mean something like this? https://goo.gl/maps/XTDwyAZy6GoqPRXt7 https://goo.gl/maps/XTDwyAZy6GoqPRXt7 That's 4-5 stories of ~4 apartments p

By row house do you mean something like this? https://goo.gl/maps/XTDwyAZy6GoqPRXt7 https://goo.gl/maps/XTDwyAZy6GoqPRXt7 That's 4-5 stories of ~4 apartments per floor, times however many of those buildings fit in the 900ft/247m length of a block. There's nowhere near enough space on the corner (here's the corner: https://goo.gl/maps/aszPHqrQVGftcqTCA https://goo.gl/maps/aszPHqrQVGftcqTCA) to collect that much garbage, much less to do it three times a week. Yes they could build big underground containers. Yes they could reduce the amount of garbage generated. But both are massive projects far beyond "why can't they just".