Why would it be dangerous for people to avoid cancer screenings if those screenings do not impact life expectancy? You might want to know if you have cancer, but doesn't this suggest that...there's no baseline argument to suggest that all people undergo those screenings?
They do impact life expectancy. The English language is a bit confusing to some mixed with statistics. They do not make life greater than average but they do make you closer to the average than if you die earlier.
