We can ballpark these odds relatively easily. Dean was 45 and Barnett was 62. Let's assume they are somewhat representative of the average whistleblower and the average whistleblower is in average health. Let's use the standard government actuarial tables[2] and assume the average age is 56 just to make the math easier since the odds of a single 56 year old dying in a given year is roughly 1%. The odds of at least 1 of the 32 dying would be 28% and the odds of 2 dying would be 4%. Unlikely enough to be suspicious, but not unlikely enough to be anything close to the smoking gun that some are suggesting.
[1] - https://www.aljazeera.com/economy/2024/4/19/boeing-subject-o...