they have 1 large location they can do everything out of. Manufacturing, storage, management, and delivery.
Ok first of all that sounds like a literal vertical monopoly. Also yeah not likely either. Manufacturing in the same location? Not all businesses can or should be doing that. Chemicals are still toxic and dangerous, even 3d printing is potentially/literally toxic and even wood shops know to have ventilation systems just for wood dust.
Also I literally said people walking to their corner store which is wayyy better than a fleet of delivery vehicles driving out to each individual house the logistics of that which are insane considering just how often they would have to do runs to cover all times of the day when people might want or need items. And all this ignores the constant return rate of online purchases.
Again I like it in theory too but like actually take a step back and take a rational look at what you are suggesting for everyone. Trapped home alone with interactions only with delivery drivers. It sounds like the lawyer from Idiocracy where we sit and ignore our garbage that piles up from all the wasted returns and climate change fucking us over.