Which is why only other meta types gain the point of Edge, just as with the original Poser qualities. Humans don’t get the bonus Edge for Elf or Ork Poser either, even on someone who is human but is pretending to be otherwise. The reason it’s a negative quality is that it relies on the No True Scotsman principle and a form of self-policing by those engaged in identity politics. The sense of betrayal felt by the base metatype would indeed end up being truly problematic if the ruse is discovered, for example. This isn’t to say that humans are somehow cool with it. Rather, I chose to keep them excluded to represent the general obliviousness of a group benefiting from systemic racial supremacy regarding someone who is “passing.” If exposed, however, while their isn’t specifically a mechanical benefit, there would be hell to pay in terms of story options.
An alternative version I considered was making it worth only 2 Karma and giving the bonus Edge to humans. In the end, I opted to go with the exact equivalent of the other Poser qualities to keep everything even. This alternate version may meet your thoughts more but I see it more as social controls by “your own” rather than by those being fooled. Like all negative qualities, they only really have importance if they are invoked in game. Any negative quality taken that is ignored is effectively a back door net positive as they give free Karma without a penalty. I see it working that way here. Never allow any negative quality you’re not going to enforce in some manner.