This reads an awful lot like we could eliminate all crime with a sufficiently strong police and surveillance state, or eliminate all obesity by attaching activity trackers to everyone and having the government ration only as much food as you actually need. Both true, but humans inherently value things other than health and longevity, such as freedom and privacy. Governments that are not dictatorship have to manage these competing demands from citizens. Otherwise, you could probably maximize health outcomes by allowing research facilities to just all operate like Unit 731. Sure, you might kill a few million people, but you're doing it to save trillions in the future.