Its the propaganda that conventional therapies make you safe, but using natural therapies makes you somehow dangerous to be around. If anything a natural "healthnut" would have a far more extensive knowledge in how to implement medical care in a illness situation.
Why is it fake? Healthnuts don't take antibiotics and they rarely ever go to conventional doctors. It seems like the author survived her "diseased" childhood. So now she has natural immunity. A real healthnut would use their own natural remedies and immune-boosting supplements, not turn to conventional medicine. Perhaps the author is working for the vaccine industry or is rebelling against her childhood.