Mmm...interesting idea...a bit Utopian...I'm not sure the world works that way...good luck to anyone investing their time, effort or other resources to get this going.
Its great in theory practice not so much. Delivery is complicated on a logistical level, especially for larger items that bikers cannot move (e.g. things not like uberEats). You have to deal with dimensional weights, freight classes, fuel rates, concealed damaged, among other things