yeah, but what about the people who work in the facotory year after year that makes this stuff?
I'll guarentee that the worst thing for ANYONES health is to work in a factory making anything. chemicals and working inside is a recipe for ill health.
It's unlikely that people working in factories that produce these chemicals have much exposure to the chemicals.
A more likely place to get exposure is in factories where the chemicals are used or applied.
However, the solution to health risks of chemicals has to a great extent been addressed through automation. The workers in such plants are at much lower risk, but there are also far less workers.
Our legal system has made it very easy to sue employers even if there isn't much evidence that health problems they end up with are the result of working conditions. As a result, things tend to get automated, or the products are manufactured in other countries where the workers have less protections and less civil recourse.