I would have no problems with drugs being made legal if we had no social net for their use/abuse. Additionally, I believe torture penalties should be in place to punish criminals with three-fold back torture or financial harm to that which they dished out to an innocent person.
Does that help you understand how I view liberty and responsibility?
It is not the fault (nor the responsibility) of the upstanding, tax-paying, and law-abiding consumers of alcohol or marijuana if others have instituted a "Nanny State" and erected a social net that encourages and nurtures moochers and losers who "give no thought to the morrow" and fritter away their productive years in an alcoholic (or marijuana-induced) stupor and/or become, essentially, wards of the State because they can't / won't care for themselves.
In other words: It is impermissible for you to hold me accountable (and take away my privileges - including the use of my recreational drug of choice in the privacy of my own home) for 1) the creation of a Welfare State, or for 2) the reckless and immoral behavior of the wastrels of the world.
Otherwise, that logic could be used to consfiscate - in the name of your beloved "prevention" - all firearms... because "some low-down polecats misuse their 2nd Amendment Rights", commit crimes, injury themselves, etc. (Just one example.)
Regards,