A business only has a given address as long as it's in a particular building. If the business moves or if another company opens up in the same building, the building would need to get those address tags anyway. The Addresses wiki page also states "there should be only one addr:housenumber=* per street and house number (which would typically be placed on the building)." so this seems to be the preferred approach.

I was originally here to fix one duplicated address but updated the rest for consistency since I spotted them.