Everyone you ever knew who smoked pot did so illegally just as everyone who ever got an abortion before Roe did so illegally, they ALL chose to ignore the law.
Abortions went from a few hundred to MILLIONS the moment abortion received the moral approval of government.
If the view of something extreme like taking the life of an innocent person can be publicly altered so dramatically by one court decision that endorsed the practice as a “Right” I doubt it is much of a stretch to think that a recreational drug would gain far more users if the government put its stamp of approval on the drug as acceptable for recreational use.
None of which would be an argument for keeping dope illegal if we were a people that still hung horse thieves and executed murderers. If we still scorned those who do not practice moderation as being of poor character and retained this public shame in the courtroom if their choices harmed an innocent, everything could be legal.
If using dope without the proper preparations to keep a polluted mind from making a decision that harms an innocent inspired an attitude of condemnation instead of inspiring an army of excuse makers to chant "It is a disease! We should give these poor suffering souls TREATMENT instead of punishing them", then we could allow nothing but personal preference to govern such actions as recreational dope consumption.
But we are NOT such a people, we excuse the guilty and we tell the innocent "Tough crap, live with whatever these scumbags do to you and keep your mouth shut".
And THAT is the argument against legalization, we are quite simply not a mature enough people to see that personal accountability must be considered in all discussions of Liberty; we are instead just children who simply “want what we want” and have no interest in considering the consequences and who have no plans to ever take responsibility for any of them.
We will indeed legalize dope everywhere without correcting the accountability issue, I have already lost this debate in the public square; and I am quite confident that my position will prove prophetic in a very short time. When that happens the dope advocacy crowd will say "It is not legalization that has caused all of this, that is just a simpletons explanation"
I always play the long game, this idea that our irresponsible and unaccountable society needs more readily available and legal ways to pollute our thinking and diminish our motor skills for recreational purposes is so profoundly bad that the “long game” will not take very long at all; and I will not hesitate to remind everyone that "Stupid is supposed to hurt so all of this should be no surprise".