The goblins in the lore are never depicted as totally liberated. The wizards continue to ban sentient magical creatures from owning wands, casting certain spells, living in certain areas, using money, etc. In fact, in the seventh book, the main characters try to get help from one goblin to break into a bank and are planning to trade him a mystical sword for his trouble, although their plan the entire time is to simply trick him and keep the sword for themselves.

The characters will point out how goblins and other magical creatures are oppressed, they might even be sad about it, like Dumbledore laments it at one point, but literally nothing is done to change anything. The best they can get is maybe a nicer person will run the oppressive government. Maybe the slaves will get a nicer master. can you guess JK's ideological position here