My dad is 78, only takes high blood medication, has for years. My mom is 75, takes no medication. Hope that I got those genes, knock on wood, I take no medication.
God bless you and your parents. Pretty much the same with my folks.
There's a fair amount of disease that's genetic, but so many health problems are the result of bad lifestyle choices, e.g. excesses in cigarette, alcohol and food consumption and lack of exercise.