Here’s some of what the American Cancer Society says about talcum powder after acknowledging talc can be contaminated by asbestos during mining
“It is not clear if consumer products containing talcum powder increase cancer risk. Studies of personal use of talcum powder have had mixed results, although there is some suggestion of a possible increase in ovarian cancer risk. There is very little evidence at this time that any other forms of cancer are linked with consumer use of talcum powder.
Until more information is available, people concerned about using talcum powder may want to avoid or limit their use of consumer products that contain it.”
The people working the mines and processing equipment for production of the talc powder would be exposed to dust. What is their medical history?