Your flawed reasoning leaves such a hole that one could drive the planet Jupiter through it. Basically, you argue that the WOD saves lives, then you use your deceased friends as the example as to why the WOD is necessary. Of course, it should be obvious to you that the WOD doesn't save lives, as the WOD was in effect when your friends used drugs and the WOD neither stopped them or saved them. Sadly, you are not alone, as this is what passes for "logic" by drug warriors such as yourself.
As to your comment that drug use is always harmful some way, some how, this just isn't true either. While it can't be denied that some percentage of users do suffer adverse consequences of various sorts, the truth is that for most users, their usage is pretty much benign in their lives. In general, the the most likely adverse effect the average drug user faces is getting pinched by the law, the tragic demise of your friends notwithstanding.
No flawed reasoning, just cold, hard facts. The tack the libertines take that somehow doing illegal and harmful substances doesn’t HURT anyone or is some Constitutional right is beyond ignorant, it’s anarchic. I will fight like hell against ever seeing these substances legalized.