The datamining here was just that the options are attached to humans. This doesn't really mean much, since races also sometimes get customization to facilitate NPCs. Like how playable Earthen "have" void skin and horn options that aren't actually playable Earthen options, they are for the Skardyn NPCs. Ditto (druid of the) flame Night Elves, Fel Orcs, etc.
Did they? AFAIK, this was just wowhead being typical wowhead; posting a clickbaity article based on datamined stuff without bothering to actually think through the likely context.