> They're ubiquitous, but few prefer them over the convenience of delivery to the doorstep. Buyers are never responsible for missing packages so there's little incentive to use lockers unless you're buying a secret gift or live in a very sketchy neighborhood or your home is so far from the warehouses that same-day delivery is only available at the locker

Then why so much effort is needed to stop package theft to the point of giving access to your house to strangers? Apparently getting package on your doorstep is not as convenient as you would like others to believe. Using such lockers is convenient and secure, giving package to recipient hands is secure but not convenient, leaving package at doorstep* is neither.

*or any other place convenient for whomever is delivering it