Because humans come in two distinct flavors. Once in a while, an error in the genetic makeup happens. We shouldn't require new language & clasifications & requirements for the few that slip between the cracks. They are scientific oddities, not new entries to the class, order, genus or species.
As I said earlier, we have problems with two...let's not muddy the waters further.
As I said earlier, we have problems with two...let's not muddy the waters further.