I’m not being clear. I mean that as your nutrition gets worse, your expected lifespan decreases and you are at greater risk of health problems. Again there is no clean dividing line between malnutrition and good nutrition. In fact, in the future we might know so much more about nutrition that many common human diets in 2020 will seem like malnutrition.
Then let's err in favor of what we can deem "good nutrition" now, and objectively adjust it later if appropriate. "You'll never meet my whimsical specification of sufficient, so your earnest objective suggestion is wrong" doesn't work.
