This study was done using data from the UK Biobank [1] which is registered as a non-profit. Participants were also volunteers only.
Send Blackhawk helicopters to collect samples by force? Was there bias in the selection technique? What about the people genetically predisposed to avoid the Blackhawk helicopters? We'd need multiple collection methods, and still need to retain an unbiased distribution. You can continue until you get to "we should set up global search patterns so that no human can escape our dystopian DNA collection". And even then you're still biased by population effects owing to the probability that there is a genetic population who have been predisposed to suppress their own genetic population at this point in time.
Gosh, it sounds like a fever dream.
https://www.usatoday.com/story/news/nation/2023/07/20/police....