Earlier quoted context omitted.
It's just how it works. There are diminishing returns to the common drugs of abuse. If given access to high quality drugs of abuse without negative economic and social consequences the body will adapt, use will plateau, and for the majority eventually phase out. A minority will choice to maintain. There are negative health consequences to long term maintenance but it's not like the reality of obtaining poor quaility…
Introducing friction to your ability to satiate your vice is the first step in battling addiction.
Because, unless you are using the term "friction" to be so all-encompassing as to be meaningless, this sounds like a recipe for a lot of failed attempts to fight addiction.