Any delivered food, be that take-out, or food-in-a-box subscription services, or services that shop for you, even if provided by the chain itself - are very expensive in my experience, compared to typical super-market food. When I usually hear food deserts being discussed - it is usually in the context of how it affects low income areas and population. And any services that charge extra for convenience and that on top of the price of food itself - are likely not a solution that will address the needs of the poor - “why don’t they just have it delivered?” is a bit “let them eat cake”-ish.