>>12Genders, as real life societal phenomena, aren't really quantified.
Just like we assign species to animals, color names to colors, names to sounds, we assign discrete genders to people for convenience.
Colors and sounds have objective reality behind them, but the naming is subjective. One may see something as more blue, other may call it green, the third will invent a new name for this weird color. And that's even before considering the fact that a color is not just one uniform wave of photons of set wavelength, but actually a combination of different colors filtered through our eyes (usually limited to just 3 correlated measurements).
Genders are significantly more subjective than colors.
Last time someone tried to define a specie and/or gender as an inherent property of a being, he was rightfully mocked with a plucked chicken.