On the contrary, I heartily agree that minors should not smoke pot - and I note that the War on Pot is counterproductive in this regard because while licensed and regulated sellers or recreational substances usually card minors, black-market dealers never do.
And why should minors not smoke pot? What is it about detrimental effects on minors that are not also true of adults?
Not having psychotic Minors is better than having them, but the same is also true of not having psychotic adults.