This meme is likely disingenuous. At the very least it is confused.
At the end of the Witcher 3, Ciri becomes a Witcher (the profession, a person who hunts monsters). The complaint is that she is a Witcher (a mutant, a person who has been mutated by monster dna), which doesn’t make much sense because she already has better-than-witcher magic powers, and is already able to drink Witcher potions (which she mentions at the end of Witcher 3, while not a mutant).
Indeed. Not sure what that has to do with this post though, which is clearly pointing to the witcheress ending (her profession) as evidence for her becoming a Witcher (a mutant).