Other examples from this: https://www.tswfast.com/content/proposition65

  Steel Products
  Steel products can expose you to nickel, known to the State of California to cause cancer, and lead, known to the State of California to cause both cancer and birth defects or other reproductive harm.

  Power Tool Parts
  WARNING: The metal parts of these products contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling. None of these products are to come in contact with food and drinking water.

  Electrical Cords
  WARNING: The wires of these products contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling.

I see. A most peculiar dystopia, indeed.

The "good idea" part was maybe the database. The "horrible idea" part was mandating notifications without defining any lower limits or exposure measures, and allowing anybody to sue for the absence of warnings. It was not just "discovered" by some lawyer, it's how the law was written. And Californians had ample time to fix it since, btw, but never bothered.