The human heart, nerves, and brain were like exquisitely precise machines that required extremely accurate handling. As far as Pomona knew, the Muggle world had divided neurosurgery and cardiac surgery into separate specialties. The doctors leading such operations were not only experienced but had also undergone systematic training. They were nothing like Isidora.
She was like a "quack." It was not that she could not treat illnesses, but that she was heavy-handed, aggressive with her remedies, and willing to use any means necessary to solve a problem.
Who would dare let a half-trained medical student open up their skull? Yet her father supported her work and let her try. Sure enough, something went wrong. One night, San Bakar visited her home and discovered that her father had become "simple-minded." Or rather, he no longer felt pain, nor did he feel any other emotions. He was like an empty shell without human feelings or desires.
Scamander had once used a large-scale Obliviate in New York, but there had been a prerequisite: "bad memories." Those memories contained negative emotions such as fear, unease, and anxiety. Jacob remembered his experiences with magical creatures because they were "good memories," filled with positive emotions. They had pulled him out of the depths of a life ruined by a failed loan, his inability to open a bakery, and abandonment by his former fiancée.
Isidora had "cut away" both the good and the bad. Without pain or fear, there was also no joy or peace. Everything was gone. Combined with the damage Obliviate did to the body, that was why her father became what he later was.
A "quack" thought she had become a miracle doctor who could cure every illness. Not only had she used it on strangers during her travels, she had also used it