Understanding is very different from blame - that's the main lesson from air accident investigation.
In particular, when you want to assign blame, you create an incentive to destroy or conceal evidence about what's actually happening. For opiates there are criminal penalties as soon as someone steps across the grey boundary between "medically necessary" and "recreational", so obviously everyone involved is going to lie about what's happening.
In particular, when you want to assign blame, you create an incentive to destroy or conceal evidence about what's actually happening. For opiates there are criminal penalties as soon as someone steps across the grey boundary between "medically necessary" and "recreational", so obviously everyone involved is going to lie about what's happening.