The issues is "drug decriminalization" people treating addictions like it's not a real problem for many people.
Many of these folks want it to get to a point where you can quite easily buy heroin and suffer no legal consequences.
I'm not saying our drug laws are just or can't be reformed but the fact that heroin is illegal prevents a LOT of people from using it. How many people will then use, aided by these pronouncements that "Heroin isn't actually that addictive!" and ruin their lives?
We already have an opioid epidemic in this country that has destroyed communities.
There's a middle ground between our terrible war on drugs and the naive "make it all legal and experiment with heroin!"