There's a reason Libertarianism is laughed at as the Communism of the Right. Sounds great on paper, but only if you ignore so much of reality.
If no one is "PUMPED TO DO HEROIN," then keeping an enormously dangerous drug illegal has no harm.
But of course, you (should) know that's not reality. People don't make logical decisions when addictive drugs are involved. People aren't choosing to do anything, the drugs are manipulating their brain. That's the disease known as addiction. So you're just completely wrong on the "voluntarily fuck themselves" part, which again highlights a libertarian's preference for not giving a shit about other people or key context. Then to rejoice at not having to "subsidize the medical bills" is just a head-shaking amount of absurdity.
Currently in this country we are seeing pharmaceutical drugs become a scary gateway to heroin use. Think "everyone who really wants to do heroin
already is?" Think again:
Heroin is not just a serious drug, it's arguably the most serious drug. No intellectual difference between the prohibition of heroin and marijuana? Just how much intellect does someone need to have to account for common sense observations that allowing the most destructive drug on the planet to be available to people on downward spirals in life is a bad thing?
I love the line "How many people out there are just dying to try heroin if only it were legalized?" because it goes back to that libertarian mental block of being stuck on looking at individuals and not a population, and disregards all of the factors that cause people to fall into drug use in the first place. Just another instance in which Libertarianism is laughed out of the room for its extreme positions.