That's like saying that Final Fantasy is preserving and breathing new life into original Indian folklore by making Shiva a hot chick with ice powers.
You tried this argument in the dedicated thread (now locked) and fell flat on your face.
Again, to reiterate:
The Witcher franchise is based on a series of novels of the same name by Polish author Andrzej Sapkowski. The video games take place after the books and feature the titular “witcher,” Geralt of Rivia, who is also the main character in Sapkowski’s works. The world of The Witcher series is heavily influence by Slavic mythology, and CD Projekt Red has carried this into their game adaptations.
Senior art producer Michał Krzemiński re-iterated this point, stating that the studio has woven Slavic cultural influences throughout the game right down to the designs of the buildings and villages. He said that the team also visited museums and pored through research material pertaining to Slavic history, folklore, and mythology to get ideas for the world of Wild Hunt.
Poland itself only recently gained independence in 1989, after decades of Soviet oppression (rapes, mass executions, etc) in the wake of World War 2 and the Nazi occupation, including the establishment of Auschwitz on Polish soil. This isn't even talking about the modern bigotry Slavic people face across Europe to this day.
It's half the reason Witcher has been so successful on the level of Lord of the Rings, because while Tolkien was largely influenced by the horrors of World War 1, Witcher is dealing with the Polish identity and issues they as a people have faced going back centuries - the core conflict of Wild Hunt is the Northern Crusades, for example. Elves and Dwarves aren't a stand in for PoC, but instead minorities Poland has dealt with in its past, including the Roma peoples.
"bu-but dragons and magic!! duhhhooiii" is only selling the power of fantasy literature short, cheapening it to be nothing more than generic hero's journeys and depressingly meaningless nonsense.