> What should happen is grocery stores should be closed except for employees and your groceries should be delivered to you, or you pick them up curb side.
Of course that would be ideal, but scaling up a delivery service from scratch is a bit harder than keeping a store running and offering both services which distributes the load a bit.
It still takes extra staff to make this happen. Normal grocery staff isn't just wandering around the store aimlessly; they're restocking and doing other administrative tasks. Most of those tasks don't just go away when you move to a curbside pickup model. You still need to hire and train more people to fulfill orders.
