You're just getting into a nebulous area now. We've already seen human characters that can transform into Worgen, and they've always been called Worgen in the game. The pedigree stands, and if the only reason you won't accept it is because Blizzard won't call them "half-Worgen" or something unnecessary like that, then the problem really is on you.
You know what playable humans affected by the Scourge are? Undead (or Forsaken, as they call themselves).
The only argument I see that you have to stand on is the fact that, when not transformed, they essentially use the Human character models. But if that's honestly an issue for you, you can always, 100% of the time, walk around in your transformed state.