This. The risk calculations can be quite scary and people's responses to them can be poor given a powerful human dislike of uncertainty. Consider a totally fab

This. The risk calculations can be quite scary and people's responses to them can be poor given a powerful human dislike of uncertainty. Consider a totally fabricated and naive example of finding a minor aneurysm with a 0.1% annual risk of rupture versus a 10% risk of death during surgery.. there are many people who would take the surgery to remove the uncertainty. (And this is a highly contrived example, real life is far more complicated!)