Why are deliveries to residences so complicated?

I'm having trouble receiving a delivery. (Hyman Soloway)

I followed the instructions on the uOttawa website, to use the residence address for the delivery, and it should end up in the uottawa mail room.

I got an email from the shipping company stating that the delivery failed because they didn't have access to the building, and they have 2 more attempts.

The thing is, they give me a 5-hour delivery window, so I can't even wait for them at the door.

Arggg why can't they just do in store pickup...