Earlier quoted context omitted.
Insurance is the first one that pops into my mind. That kind of data changes their bet on your risks heavily into their favor and can disadvantage you if your genes show anything corroleated with late onset diseases. Depending on how this information is regulated, it could also affect the insurance for your biological children. For more hypothetical societal risks, I’ll cite the movie Gattica where DNA credentialism…
I mention the insurance risk in my post. Yes, I do think insurance companies will try to use this data. I don't see how to avoid it though. It seems to me that it is inevitable that they will get my DNA at some point. That said, I buy insurance for the unknown risks. If I had a known condition, I would expect that to be factored into the price.
Insurance only works as a system for society if the risk is spread among many parties, but if the insurance companies know the risk ahead of time it ceases to subsidize the unfortunate, who are left out in the cold (taxpayer funded programs and hospital ERS)