I am not sure how exactly is this an argument against High Elves since the introduction of Allied Races. Most of them are of the same race as their 'parent race'. Especially consider Mag'har Orcs and regular Orcs which are exact same people with no political, cultural, philosophical and physical differences beyond skin colour. Heck, there is a possibility that some Orcs have doppelgangers of themselves among Mah'gar.