Except banning heroin clearly didn't work so well! There's still a lot of people using it. And the profits from selling it go to criminal gangs. And the people using it often die due to inconsistent dosing.

How do you define "manipulative potential"? If you ban sugar in drinks, do you ban fruit juice too? Where do we draw the line for "acceptable harm"? Personally I don't want to live in a society which bans huge numbers of things.

Our bodies interact with extremely large amounts of elements in the environment and behavior that act beyond our conscious comprehension.

Sometimes in our favour and some others against us.

Banning everything that at some point worked against us is just establishing human life full of total deprivation. Worse than living in jail. Good luck maintaining a society in those conditions.

The individual and the society should instead focus on educating and teaching how to navigate an environment full of those elements.