On average, being more attractive means being more successful. Being successful leads to more money. More money leads to being able to afford more food, less stress due to more economic stability, and more access to better healthcare.
Obviously not 100% guaranteed, but kind of obvious when looking st averages.
It’s probably because damsels in distress get rescued by the male protagonist while hags are on their own and have to rely on hissing and casting spells.
This finding remained robust to the inclusion of covariates describing high-school achievement, intelligence, family background, earnings as adults, as well as mental and physical health in middle adulthood.