i've read No More Letting Go. I agree with the author and look forward to a society that does not enable addiction in the same way we no longer tolerate drunk driving. And I'm old enough to remember when drunk driving was tolerated at all levels of society, so I know that a "societal psyche" can be changed.
In my situation, there are not enough family and friends to do an intervention on my son. But i do "soft interventions" on him every time i can. Any act of loving detachment can also be called a soft intervention.