it’s a loose usage. necessary but not sufficient type of thing. if all your DNA instantly disintegrated, the process ends quickly, you are not you in many senses of the word. to preserve the artifact of DNA is to ensure (some of) the process continues uninterrupted; at least a few major failure modes of “the end of you” are mitigated. but gotta love me some Buddhist pedantry y’all can spar with the best