And yet we could regulate even more to make flying even safer, but likely negatively impacting the cost of flying.

This is a balance/tradeoff. We agree for some deaths, for a given price. It is the same for food safety, workplace safety.

With the latest designs and regulations there has been no major issue across all the nuclear facilities, except for Fukushima which sustained a 9 earthquake + a tsunami... and yet hardly any death (in the 10 years after, one death by cancer got compensated but still not clear if it was directly linked... the evacuation itself might be responsible for up to 50 deaths though, showing how the perception of nuclear can be overhyped).

It is possible that the nuclear industry is over-regulated (done mostly after Chernobyl) and could benefit to be reviewed based on the current knowledge.