sun41
What do you mean with "all sorts of problems"? Most people with "mental" problems do alcohol which is a really bad hard drugs. But if you mean with problems: treating depressions, treating all kinds of headaches, palliative treatment, not knowing what to do with your life, etc.. then what would you want to regulate for this group?
Psychedelics are a very harmless drugs; not addictive, there is no poisoning(like with alcohol), when the effect is gone you feel totally normal and healthy. The only thing you need to be careful with if you really want the best result from it is the dosage, never too much like with many other things in life.
Prohibition of psychedelics only causes criminality and harm, it doesn't solve a problem at all. It is an illusion to think that your children are not able to get their hands on it when it is prohibited. The truth is they'll get questionable quality LSD in the criminal circuit, or they'll pick magic mushrooms theirselves which can be quite tricky!