But your challenge made me go look, and in about 20 seconds (https://duckduckgo.com/?q=prescribing+heroin+for+addiction+i...) I found: http://pb.rcpsych.org/content/29/4/123 and http://www.recoveryfirst.org/englands-heroin-experiment.html...
This is a process, attitudes are changing, they have not changed.
Interestingly I have never heard of suboxone. I do not think it is widely used in my community, where methadone is prescribed to addicts.
I no longer have direct connections to addicts (I found that ruinous to my lifestyle) but 15 years ago in my country any body who wanted could go on a methadone maintenance programme and heroin use almost dies out completely.
It did not completely die out as there was a residual interest among users who were not addicts (yet?) so had no need of a methadone habit which is as useless to a drug enthusiast as a nicotine habit, but much less harmful and much less socially acceptable.
These days I have connections to the treatment community which is different and a lot of interesting things are happening (look up ibogaine). I also campaign in the political sphere for drug legalisation as I have seen the harm done by police and judges to those I love.