PS: And objects in OSM are NOT "owned". It is a fundamental part of any community editing project, be it a wiki or a database like OSM, that existing data can be improved, no matter who has originally created it. If you look at the history of pretty much any object in OSM, you are likely to see edits from several users other than the original creator.

In this case, a contributor has added a tag that in that contributor's view was missing, and the community consensus is that we tend to agree with that contributor. The first one to revert the addition, and hence the one who started the revert war, was you.