But you hardly provide tissue samples as you age. Your point has little to do with my argument :/.

Registration at birth is a choice we made because of the social values of planning. It's unlikely that those same people, as adults, would consent to yearly tissue exchange or other undignified spying apparati.

"Your point has little to do with my argument" - It's unclear what your argument is.

In addition to registering for an SSN, we provide images of ourselves as we age for driver's licenses, and some interactions with law enforcement end up with one's DNA being collected. Allegories to your dystopian state you feel people would balk at are already standard practice.

Bad stuff can be (and has been) done with this information (and that sucks), and as was stated above, so has exculpatory stuff (which is great).