This always made a whole lot less sense to me then say, solving the logistics of grocery delivery. Which isn't solved despite availability, because it's "solve

This always made a whole lot less sense to me then say, solving the logistics of grocery delivery. Which isn't solved despite availability, because it's "solved" by just having someone else walk through a store, maybe doing a few customers orders all at once. Like it would seem to me that for, at least packaged goods, an entire city could and should be serviced out of a couple of warehouses with better stocking and fulfillment systems?