[s1artibartfast]

Models can breakdown at huge scales because they introduce other non-representative factors or nonlinear responses.

Sending an astronaut to the center of the Sun and concluding their death is from radiation would be a pretty bad model.

Hitting a person with a car would be a pretty bad model for a fly landing on them.

The first model is bad because the sun is doing more than just exposing them to radiation.

The second model is bad because there's a nonlinear response to force applied to a human body.

[peteradio]

There needs to be an understanding of the mechanism of cell death in the OP. And then the question is, under what circumstances will it occur in the human body? Is it basically impossible because the body is filtering it out? Or is there some long-term accumulation where eventually we will see some parts of the population suffering these ill effects? Unknown, but without studies like OP we aren't on the first rung of the ladder.

[s1artibartfast]

Sure, Data is data. It is the extrapolation and conclusion that are suspect and dishonest