To put this number into perspective, there are roughly ~30k automobile related fatalities in the US each year.

HN tends to glorify self-driving vehicles because they might put a dent into that statistic. I wonder why that concern doesn't apply to drinking water.

In fairness, the cancer odds were lifetime. So would would have to divide that hypothetixal by 80 or so to compare to annual car deaths: 750

Sure, but the OP was talking about personal “fear” not public policy. I absolutely agree these should be investigated for public policy purposes because of tve potential aggregate effect. But don’t worry about it.