It is very clear these so-called "laws" are for those engaged in commerce only. These "laws" were never intended to be used against users.
Look, it really simple, Congress only has two basic powers delegated to them in Article 1 Section 8 of the U.S. Constitution, to regulate commerce and to regulate the employed militia. Everything in Article 1 Section relates to these two things.
So, its really simple to figure out that this act of Congress is either related to commerce or the militia.

The "Ultimate User" term makes it abundantly clear if the substance is for your own use than it is a lawful activity.