> sold talcum powder that caused cancer

Ummm

Your link contained no evidence for this. A search of the NHS website also suggests no clear evidence [1]. Cancer Research (a respected UK charity) give a layman's summary (albeit focusing on ovarian cancer), stating no clear evidence and pointing out that there are far more serious risks to worry about [2].

[1] https://www.evidence.nhs.uk/search?om=[{%22ety%22:[%22Inform...

[2] https://www.cancerresearchuk.org/about-cancer/causes-of-canc...