"they exist because it’s the status quo of corporate structure"
This is circular which may have been your point, but do you have a theory as to how they originated?
Lots of people's best defense against doorstep scams (and predatory salespeople) is not to open the door. I always open the door because I can easily fend off such people.
As it happens my street has a confusing layout which means I get lost food drivers at least twice per month. It only takes a moment to direct them to the right house.
Heh, I'm in the opposite scenario - Uber's map's shitty routing directs delivery drivers to the block behind me, so often my food gets dropped off at the wrong house. Luckily, they are not the type to open their door to unexpected knocks, so the food is still there when I go to collect it.
