However, my question was a bit more pointed and I think you haven't addressed it.
The justifications used in your post are equally applicable to cocaine and to other drugs. If different drugs have different answers, why didn't you (or why don't you) explain why your argument is limited to marijuana.
OTH if you strongly believe in the philosophy outlined in your post, what is stopping you from endorsing similar initiatives for cocaine and why would cocaine potentially need a different answer ?
[edit] I see a lot of good responses, but all of them special-case marijuana (e.g. marijuana is less addictive than heroin). This is fine, but Paul's post has flowery language about freedom and all of that language is applicable to heroin as well. Paul's post doesn't make the case for special-casing marijuana. On the contrary, if he denied the principles of "freedom" for cocaine, it would undermine his post which is all about "freedom" and nothing about marijuana being less dangerous than cocaine etc.