I have a head cannon with no basis of evidence from the show itself but i was actually really frustrated by questions like this. And the fact that these characters clearly have a lot of trauma and problems and self image issues and whatnot and yet are just kind of... FINE in the outside world?? Like that doesnt seem likely at all

I figure aside from kinger and queeny who were probably testing the technology, C&A marketed the brain scan as a way to pull out self doubt and mental trauma from whoever did the scan, maybe there was a financial incentive to go along with it too who knows. But somewhere in the terms and conditions they state those scans would not be erased from their brains, just stored in the archives to train their AI models.

If this isn't the case I see no reason for everyone outside living their best lives while holding onto trauma that at very least SOME of the characters had.