BTW in Scotland at least, during the Christmas period, it is customary to leave a Christmas card for the postie outside with a small bank note in it. An easy way to say thank you for their efforts and to ensure that the postie will remember your name even better next time ;)
Also, while I agree with you that in this case (having a full postcode as well as name) it would have likely been an easy task for the local postie, Royal Mail do actually have a small team* of people who work in figuring out more tricky ones, so if a local person can't work it out for being on their beat it can be sent to the "address detectives" (great title!) to try to solve.
This is a great example of that from a year or two ago, including a few other similar stories at the end: https://www.theguardian.com/uk-news/2022/jan/07/lives-across...
* My knowledge is both 20 years out of date and fuzzy in my memory, so I've no clue how big a team it is nor if there's enough confusingly-addressed items to need anyone working on it full time, or if it's just one aspect in a wider set of responsibilities that a team does when needed.
The postal office in Norway tries hard to deliver to the correct destination. I've heard of similar stories where they only had a name and a city to go on, and it was delivered at the correct location. During Christmas, they even have a team of dedicated "detectives" who tries their hardest to figure out who the packages should be sent to.
Once, someone I knew in Norway (ok, my sister again...) somehow managed to combine her old and new address when ordering something online. And that parcel back and forth between 2 cities for a long time... :)
It's even better than that. Unless you are incredibly rural or the street is tiny, most streets have at least two postcodes - one for the odd side and one for the even side. In most cases, there's only about 15-30 houses in a postcode, any more on a road and it's split up into smaller chunks.
3 days later our postie knocked on our door and asked if this parcel was for us!
We don't live in a big city but still it is a town of 20,000 so not that rural where everyone knows you, so I was impressed that they cared enough to try to figure out the address. Granted the post code narrows the search down.
I am certain had it been shipped the other way the post office in Norway would have rejected it immediately for not being 100% by-the-book.