I agree it seems a little shoe-horned to make her a classical witcher. I hope it’s not just to give her the title, because she could easily be the protagonist, and/or have the job of being a witcher without the trial of the grasses. She was given the training and education of a witcher, and has magical powers of her own already. Receiving the trials would be a huge deal, narratively, to the characters, and to world building. I could easily see this being a fumbled corporate attempt at placating fans that wanted to see geralt, without any regard for the characters or world building. (Similar to “Rey Skywalker” having absolutely no business being a Skywalker). But that’s all speculation. If it’s treated as a major plot point, and not done just for the hell of it, it could still be good.
If they actually wanted to protect children, the answer is simple: reverse the responsibilities. Require porn sites to include metadata indicating it isn’t safe for minors. Require browsers to recognize that metadata, and filter out that content if parental controls are enabled. If parents are still too lazy to turn it on, make it default (like “safe search”, but more effective). The fact none of them have even suggested this is proof they don’t care about children or even porn, they just want to be seen as if they do.