The problem is not just that he is choosing one of his names over another one, but that he is using a name which isn’t actually his. He might have been ok to use Wales instead of Sussex before QE2 died, but Wales belongs to William’s family now, not Charles’s. In his attempt to appropriate something that is William’s, he looks like he either thinks he is also the PoW, or that he’s one of William’s children 🤦♀️
Or of course it could be a mistake, bound to be, how would anyone even about the Sussex title or that QE2 died and that William is PoW, there’s been hardly any media coverage 🤔