answer:Intelligently, yes. The main problem is that citizens (writ large) are stupid. Or at least ignorant and uncaring. As soon as the word would get out that ‘additive x’ (assuming it was scientifically vetted) would be added, you would have half the population shouting “nanny state” and half the population shouting “it’s good for you”. We have just seen what happens when the citizens pick one of their own – an ignoramus like Trump. I would much rather rely on the conclusions of experts than a vote of the uneducated citizen. Mob rule is inherently dangerous.