Yes, the deployment cost will vary if you draw enough lines. But higher charges in poor neighborhoods doesn’t mean that’s where the highest costs are. Wealthy neighborhoods with large property and low density could have a higher per-home infrastructure cost. All that trenching adds up.

LA is drawing one line at the city limit so there’s only one cost. All customers will pay an equal share of the total cost.

This allocation is a matter of perspective but neighborhood boundaries are a classic tool of oppression. Similar to toll roads and bus fares. It costs a lot to be poor.

Famously AT&T was required to offer local service at a loss to maintain their monopoly. This seems consistent.

Society benefits when everyone has access to basic services.