You usually use obviously beneficial cases to push boundaries. Having your medical insurance pay one of your relatives for their DNA to re-rate you and other relatives or other horror scenarios will follow later down the line, once we've shown willing to give up privacy.
This entire "you share lots of info (DNA) with your relatives, thus they can screw you with it" is a pretty new issue. I doubt we understand the full ramifications, yet, and thus i'd prefer caution instead of the government giving others a green light to screw me in ways i cannot even imagine, yet.
"Family members can screw you via relation" isn't really a new issue. English Common Law generally moved the legal needle on literally being killed or sent to jail for the crimes of a relative thanks to the abolition of "corruption of blood" law, but there are a lot of other ways you can be on the hook for a relative's actions.
