For me, it's not so much regulation vs. deregulation or political ideology. I'm more pragmatic than idealistic. In fact I only briefly thought about that. It's more short term vs. long term and, basically, effectiveness.

For example, weed relaxes you and if you take it enough you can sustain a relaxed lifestyle. But then you become, to a certain extent, dependent on weed for this relaxed state and I'd rather work on something bereft of such an external dependency, like meditation as previously mentioned.

[edit] I am, of course, still assuming that this supposed drug takes over from your internal mechanisms that induce concentration, as opposed to strengthening them, meaning once you stop taking the drug you lose your enhanced concentration. If the drug does strengthen these mechanisms on a long term basis then I'm all for it.