Most heroin overdoses happen either from a sudden increase in supply purity, or from an abstinent addict relapsing and taking their regular dose without realizing they have lost their tolerance.
Any kind of rational change in policy is not happening as long as entire lucrative industries of policing, health care and religion-as-a-social-service are dependent on the dependent.
This cuts to one of the more important points here. Rent seeking behavior in public health is crazy to witness.
Don’t forget for-profit prisons!