This is survivorship bias at its finest. What his father is experiencing is luck mixed with good genetics. Plus, additional support of good diet and exercise. Yes, we all can control our diets and exercise. However, we cannot control the medication that we take, which carry side effects. We cannot control what is in our food, we cannot control the air we breath, we cannot control cancer and hundreds other diseases. T…
What makes you say that? The medications one takes are due in part to decisions made earlier in life, which result in conditions experience later for which the drugs are prescribed.
Also, drugs aren't the only solution to certain medical problems. For example, you can take weight loss pills, or you can actually cut your caloric intake.