Some people are weak minded and maybe it affects them worse, but I do not think banning it is the answer. Most people would benefit from its medicinal and recreational effects, and the small minority it could possibly hurt would need to live with that challenge.
I think people are addicted to pot like they are video games, binge watching tv shows or any other habit, but chemically its not addictive. Unlike coffee, tea, alcohol and tobacco which are all addictive chemically.