Unlike Planet Darvis, the division in Planet Austere was stronger.
The less than 10% territory that was yet to be claimed by the apocalypse beasts was shared by the Skyrim race, the Human race, and the Sheikh race, every other race in the Lizardmen and the Demon Outcasts were minor races.
The hunter union was the only thing keeping the surviving races in Planet Austere from crumbling from within.
Perhaps, if there were no Grade B Supers, the Planet would have long been overrun by the beasts of the apocalypse already.
The distinction between the major and minor races set up a hierarchy and set limit in the hunter union, no Lizardman no matter how powerful they were could rise above the 5th rank in the rankings of the hunter union.
The 5th rank was their limit and it was for only Grade C hunters.