Are the concerns expressed in the article actually of any relevance?

What if it was alcohol or tobacco that was being legalized.? Or coca-cola or chocolate cake? Or 1,000 calorie super cheeseburgers?  There would be a litany of warnings, long lists of the dangers and possible repercussions of over-consuming any of these thinks, and all of them would be accurate. But so what? It is legal to drink and to smoke and to eat over-sugared  or fatty foods..

The question here is not whether people should or should not consume marijuana, it is whether it should be a crime to do so.