On a national level, agreed. I believe a state may legitimately prohibit substances, however.
No matter, I think mj prohibition is and always was a fool's errand. One look at the electorate tells you it's on its way out. Opposition is highly concentrated in the oldest age group, while the strongest support is in the younger groups.
Exit polls from the 2014 medical marijuana vote in Florida illustrate this point. The measure got 58% of the vote, just short of the 60% needed. The numbers are striking =>
Ages ==> Yes / No
65y + => 38% / 62%
50-64 => 58% / 42%
40-49 => 63% / 37%
30-39 => 68% / 32%
25-29 => 75% / 25%
18-24 => 83% / 17%
From the same electorate that elected Obama, and for the same reason. They are out of their F***ing minds. Incredibly stupid, incredibly misinformed, it is no great surprise that from this group one stupid thing will follow another.
There's a reason why everything is going to sh*t at the same time. It's because the populace has become too stupid and misinformed to maintain civilization, and this is just more evidence of that sorry state of affairs.