I had the same question?

yeah, editing genes to lower cholesterol sounds like a terrible idea for several reasons

Having chronic stress isn't too bad for your heart on it's own; neither is high cholesterol. Having **both** blows up the odds of a heart attack & reduces life expectancy by a lot. Throw diabetes in there too, and the heart cardio system is fucked, but diabetes is preventable & curable, where stress might be e.g. lifelong brain damage from newborn "care" 🤷‍♂️

Because the brains trust only knows how to treat symptoms, and not causes.