Because ignorance is not always bliss. A genetic health test is what will ultimately enable you to make the best lifestyle choices. By making the lifestyle choices based upon the results of a genetic health test you can actually mitigate your risks of developing the condition. This applies to anything from prostate cancer, diabetes, breast cancer and many more.
Think of lung cancer? Not all smokers develop lung cancer although the correlation between the two is very strong. But imagine you do find out you have a high genetic predisposition: Do you really need a better excuse to totally stop smoking?
Wouldn't it help to know that you are genetically predisposed to obesity? This would enable you to get appetite management tips and ideas from a nutritionist, possibly saving yourself obesity and the many diseases that come with it. Proper health management is the key to your improved health. A genetic health test can help towards disease prevention.
What is considered as good food for some can turn out to be dangerous for you based on your genetics. For instance, Grilled foods are considered to be healthy, however it can be a disaster for you if you have a genetic predisposition towards colorectal cancer. Food, exercise, sleep, supplements, meditation etc are highly individualised and what works for you or what works against you could be found only from your genetic profile.
The hereditary aspect is also significant: Suppose you have a history of cancer in the family? Perhaps prostate or breast cancer? Does it worry to think that you might develop the cancer as well? Then a genetic health test could put your mind at rest by telling you that your risk of developing the hereditary form of the disease is very low or nonexistent.