I'm not saying there aren't drawbacks, but I can think of two benefits:

1. It makes some forms of investigative journalism easier. For example, there has been a lot of discussion about the potential problems of having most of the influential journalists in Sweden living within a very small "hipster" area in Stockholm.

2. E-commerce companies may decide to only ship to the adress where you are officially registered, making it harder to commit e-commerce fraud.