IF there was a secure and trustable way that a trusted government could retain DNA information, then I feel like people having a DNA test at birth or on becoming a citizen could be useful, both medically ("your sample indicates you may have a higher risk of dementia") and from a policing standpoint ("we found DNA on this woman's clothes and immediately matched it to this man who hasn't committed a crime before" or "w…
You never know who will be in power tomorrow. The convenience of a centralized system today does not outweigh the catastrophic danger of that system in the wrong hands in the future. Specially nowadays.