If a pilot takes an unnecessary risk and survives, is that luck or judgment? Those who don't take unnecessary risks are much more likely to survive.
Older pilots will usually have more experience and less of a risk-taking mentality than younger pilots.
Motor insurance companies also recognise that with drivers; young male drivers having the highest premiums with pensionable women having the lowest.
Not sure why the concept puzzles you?
Cheers
Whirls