SE took a while to make a cat specific hair...
They did Midlander(twin tails), Roegadyn(side cut), Elezen(french braid dealio), Highlander(dreads), and just now got around to Miqote(hairband)/Lalafells(long ponytails).
This is literally the first time a new hair has been released for cats only, so I don't know what you're spouting on about it being the 'usual'.
They chose races that don't get played often first to try to attract more players to them, and make those already playing them feel better.

SE has been giving one hair to a specific race each time and unlocking the last race-specific hair for all races.
And while the twin tails were technically already in game before aesthetician, SE took a hair to get the ball rolling for this pattern.
You will get this hairstyle the next time a hair is added. It takes time to convert hairstyles for each race, be patient.