agreed insofar as it is the most basic argument against prohibition that applies to anything > you can never ban drugs, only safe drugs > you can never ban guns owners, only safe gun owners > you can never ban prostitution, only safe prostitution etc  obviously it's true. people who really want prohibited items or services will find a way to get them. but prohibition still disincentivizes most people from pursuing them in the first place. when drug policies were tough, there were much fewer zombie addicts, now they littler the streets. developed countries with serious handgun control have way fewer shootings than the us. even alcohol prohibition in the 20s massively reduced alcohol consumption despite meme arguments about how it was a complete failure. it was repealed because it was costly to enforce, but it still massively reduced alcohol consumption by making alcohol less safe to attain or even consume.  banning things works because only people who disregard their own safety to get them suffer. everyone else simply makes the smart choice to abstains. it's amazing how there are still people arguing against prohibition. everything should be prohibited.
Canada