Your anecdotal "experience" does not supersede researched evidence of the effectiveness of these programs. You provide no data, no analysis, no research whatsoever to support your claims.
And you have no data to support your claims because no one has looked at this particular issue. Why should your opinion that it has no effect be given any consideration given the overwhelming anecdotal evidence that it is a serious concern?
Aside: this is a game that see played by your ilk all of the time:
1) Find a study that looks at a narrow set of problems;
2) Assert that no one can question your ideologically driven preferences because of the study;
3) Accuse people of "not having data" when someone points out problems that the study did not look it;
This BS is tiresome. If you are so convince that risk of enabling addicts is not a concern then show me the studies that looked at the problem specifically and what methodology they used.
If you can't do that then just admit you are hypocrite.