Don't care whether they live or die? Kind of moralizing a bit there.
I don't think my brother had a death wish when he was introduced to heroin. He had an addictive personality and quickly became an addict. When he OD'd it likely was not a suicide but an attempt to get high. He apparently had progressed from having others shoot him up to doing it solo.
Yes, heroin is more medically benign than alcohol if used correctly, but the addictive power of all opiates is something that makes it dangerous for abuse.
It should be legal and well regulated, and drug education should be shifted to awareness of addiction and how to avoid it.