Efficiency.

If a driver has to spend 4 minutes of every hour doing stupid antics to get an order, and can earn $15/hour doing antics+delivering, then effectively $1/hour is going to pay for stupid antics, from Amazon's perspective.

Amazon would like to switch those 4 minutes from "doing stupid antics" to "doing deliveries" so that they can pay the same $15/hour but get a full hour of real work instead of only 56 minutes.