Happy to let someone else address this false equivalence in depth. All I will say is that substance use is a personal choice, there's no evidence that the legality of a substance makes it more/less likely the use thereof will impact oneself or others in negative ways (indeed, alcohol is probably one of the worst substances in terms of addictive potential, anti-social effects while intoxicated, likelihood of eventual physical/biological damage because of frequent use, etc), and indeed all the evidence we have so far shows that making substances legal and also making resources to help those that have substance abuse problems widely available decreases negative personal and social effects of substances while also, from a moral/ethical standpoint, allowing people the freedom to alter their consciousness and body and way they want to, so a win win.