[alt text: Text which says, “The 2 genders according to chuds”. Below the text is two images. On the left is an image of Geralt from The Witcher 3, and he is labeled, “Male, parentheses (white)”. On the right is an image of Ciri from The Witcher 4 trailer, and she is labeled, “Political”.]
I’m 100% for Ciri being the main character and I’m also complaining “what about the lore”. You can do both at the same time. There’s a vocal minority of people who’ll use the lore argument to be sexist assholes, but people who have actually read and understood the books can have some valid concerns (ie where and how did she go through the trials, why can she use magic again, where did she even find how to do the trials, and just… why? She didn’t need them and it’s a bit of a character regression. She was basically already a witcher by title.)
The way I understood it was that she did not loose her ability to use magic, but rather decided not to use it any more after what happened when she had to draw power from fire.
Spoiler
She also used magic to escape Bonhart/Skellen/Rience after Kenna’s attempt to read her mind unintentionally gave her a bit of magical power.
Even if it would be a bit disappointing, I think an explanation as simple as “she grew older, and had a lot more time to deal with the trauma of what happened in the desert” would be sufficient to explain why she is OK with using magic again.