We should be educating people about the dangers of narcotics addiction, and helping those who are already addicted through rehabilitation programs. They should have access to the narcotics for reduction therapy/tapering. But they also need a lot more — counselling, withdrawals management, relapse management, replacement therapy, group support, and other effective measures.
I suppose the core of what I am trying to say is this: harm reduction is not addressing the core issue effectively enough, and calling any part of harm "safe" communicates a wrong message and is damaging. Harm reduction efforts are important, but are not enough alone; continued narcotics use not be sold by politicians as "safe". There is a subtle but distinct difference between "safe" and "safer", the latter of which is appropriate in harm reduction efforts, but not the former.