I can see this as possible. I had my DNA done at MyHeritage a few years ago to see if my dad’s genealogy searches were right. They were.
A family member that I found though the DNA check pointed me to a place called Promethease. You upload your raw data, they analyze it, and tell you what diseases and conditions you are susceptible to from your DNA. Some of the results won’t apply to you unless you have Asian, etc. in your ancestry so you have to weed through it.
Mine was extremely accurate. It said I had a chance of genetic high cholesterol (I do). It also said I was at risk of being an alcoholic. I don’t drink but I have one brother that is an alcoholic. It didn’t find any cancer risks unless I had some Asian DNA (I don’t).
The point of it isn’t to say you WILL have issues but that you MIGHT have issues with some behaviors. It’s like an early warning system.
If they can do that, why can’t they find cancer through DNA?
DNA doesn’t take into consideration environmental factors a person may be exposed to, and individual destructive behaviors, like drugs and alcohol.
It’s like a stick of dynamite without a fuse. It might never explode until someone adds the fuse and then something lights it later..................