Conspiracy theorists exist in many planes of expertise and essentially prey on vulnerable people.
Birth control medication has potential side effects, but so does anything else you take and the risks are extremely low comparatively.
The “too dangerous” idea is a myth. Birth control is safe. Birth control is a good thing.
The truth about birth control - Vox:
https://www.vox.com/politics/351179/birth-control-is-good-actually