While kratom is habit forming and can "fuck you up" if you have no tolerance, the true value is for the person already addicted to opiates looking to get clean.
If you want to keep drugs out of the hands of kids, make them all legal and watch the usage numbers fall. Banning a powdered leaf, that is quite self-regulating, albeit habit-forming, is a step backwards in the quest to put out the structure fire that the opiate crises has become.