Recent Gnome sequencing research is revealing that actually a Gene (downstream) doesn't necessitate a Health/Medical Condition (upstream) [1]. I think we need highest security measures, user education and Regulation when it comes to DNA, medical records, and biometric data (face, finger, iris, voice etc).
Charles Darwin & Co documented their theory of evolution well, there's enough ancestry there for most i think, at least as a solid starting point / platform. My guess would be if there was more education around theory of evolution (science), there would be less interest in Ancestry services (DNA based), leaving only a Medical case for them, and hence demanding greater protection/security.
[1] A biological relativity view of the relationships between genomes and phenotypes, Denis Noble - https://doi.org/10.1016/j.pbiomolbio.2012.09.004