Now your just making an assumption. There are a lot more games out their than the FF series, if you like it or not. People don't have to know anything about it beforehand just because it's there and successful.
Look at it this way if you are making a mmorpg you want to be open to the general gaming public not just Final Fantasy series playerbase. And good communication is vital in that part. For example in the SWTOR they didnt name Jedi Knights blue lightsaber jedi or jedi consulars green lightsaber jedi. Since the colour of the lightsaber doesn't add much meaning to the playingstyle you are going to get.Nope because outside of the FF world they mean nothing, but we are talking about Final Fantasy XIV, are we not?