Pushing cases like Raich to their logical conclusion, it might well be that the federal government can, by the same logic, prohibit states from banning items that the federal government has decided are okay, since they are in the habit of prohibiting states from allowing items that the federal government has banned.
However, that's not the way the current tortured logic of the legal system works. Things can be banned in one state and not in another until the Supreme Court or your local federal circuit court says otherwise.
Imagine a pathologically idealistic, anti-religious, culturally-relativistic, iconoclastic, socially-irreverent, sociologically-progressive signature line here. Or don't.