So aside from the fact that my address has around a 50/50 success rate with people trying to find it (My address is a building + street name that has a mirror building + street name across the other side of a motorway)
Transferring the address, the obvious example people give is emergency services but this applies to so many situations, I volunteer with a litter picking group and they have found w3w extremely useful to communicate locations, you "can" transfer a pin but you need those devices set up to do a transfer already, with w3w I can check the website for the location on my way out the door and enter it to my map on the way, people who arent setup as contacts can transfer it without having to trade phone numbers etc.
Its hard to understand how someone could not find a way to easily memorize and communicate a specific location a very useful thing?