Could this be a cure for cancer?

The article Gene tests 'create undue stress' says that looking at and scanning genes may help lead us to seeing if you have a higher risk to get serious diseases such as cancer, diabetes or heart disease. Some scientists agree with the idea while others like Professor Samani don’t think there is any use for it at the moment. He says there is no real value in it at the moment, causes undue stress and it causes people to think they are safe (if they are in the lower risk level). I think this is a good idea because they are trying to find a way to detect very deadly diseases early so they can treat you before you get really sick. I would probably do the test if they offered it to me.
This could help the world in the near future because if you were able to scan and see if there was anything wrong you could get rid of it before the major sickness kicks in. Imagine how many lives could be saved from this treatment. This could be a cure for countless diseases. In my opinion, it’s worth a try.