We need to be careful and not draw general conclusions from specific cases. The fact that one's relatives had high incidences of cancer is not evidence that what they did for a living led to that cancer, or that the rest of us should avoid doing whatever he/she did.
Those "anecdotal" reports relate to individuals, not to populations at large.
I could choose the opposite approach: Harold McCluskey from my city absorbed the highest amount of Americium-241 in history from a nuclear production accident. He never developed any cancer, though he pee'd radioactive urine for years. Is that evidence that transuranic elements are not carcinogenic? -- of course not.