It's a movie. It is, furthermore, an action movie. Time would be better spent analyzing the affairs and politics of real people...or even by picking one's teeth. The contemplation of hinted sympathies in a fictional character in an action movie is one step short of a X superhero can beat up Y superhero discussion.

Currently only a few drugs are legal in the USA, most of which are terrible for you and provide no enhancement. Of the illegal ones, few provide any worthwhile effect and. The logic behind illegality in drugs has been and always will be insane. This relates here to the most extreme of degrees. Now regulation and prohibition of drugs will not only limit one's consciousness expansion and recreation, they will actively forbid people from legally exploring the possibilities for those willing to explore the potential benefits of modern pharmacology for the human brain.

In short, it's my body and I'll put whatever I damned well like in it. There is no worthy justification to the contrary. This is the clearest example this argument will ever see.