[nradov]

The point is that for individual lifestyle decisions you can't take a reductionist approach and look at individual factors in isolation. Maybe moderate sunlight exposure causes DNA damage, but so what? Does it actually reduce lifespan (or healthspan)? Probably not, or at least we don't have any reliable evidence that it does.

[oaktrout]

I agree. I think it's also reductionist to say sun avoidance increases mortality, at least based on the evidence we have.