If a package is correctly addressed to you, there is no mistake. That is how the law interprets it. That's what an address is...the intended recipient.
If the name or address are wrong, it is a mistake, as there is a discernible error in the intended recipient. Your name, my address...there is an error, and I need to find you or the shipper.
It's really a lot simpler than you are making it. If it says your name and your address, someone intentionally sent it to you. That is not a mistake. That is a delivery. The odds against the recipient name and address being wrong, but correctly associated, are astronomical.
For example--
I came home from work one day and there was a box on my front porch, with my name and my address. There was no return address. I opened the box and there was a handwritten note that said simply, "ENJOY!". Said box was full of soaps and a couple of splashes from a completely unknown, unsolicited source.
Now...you tell me exactly how any court could make the remote determination that this package was not intentionally sent to me. There is no legal argument against that package being mine. It was sent to me.
Identity is the entirety of the law. The "owner" of the package is identified in the "ship to" address. If the name and address are both mine, the package is for me.
The law is really that simple. If the name and address on the package both belong to me, so does the package, regardless of whether it is expected or not.