This makes the demonstrably false assumption that what's good for you, today, is good for everybody, all the time. Different bodies need different things, and

This makes the demonstrably false assumption that what's good for you, today, is good for everybody, all the time. Different bodies need different things, and no single dumbed-down number like that can ever take that into account. What we need is better ways of making clear just what those needs are to people, which ultimately comes down to better education. Is it a quick solution? Absolutely not. But it's the only one that can genuinely help people to improve their own health through nutrition. That said, we can also improve our regulation around these things based on the best science we have available, to do things like ban or require labeling and appropriate disclosure of substances that are known to be universally or commonly harmful.