Earlier quoted context omitted.
Is it possible the probability of success of treating the use of certain brain altering chemicals is untenably low, even if treatment was "properly" funded?
I don't think so. Portugal was famously very successful at drug decriminalization, at least until they slashed funding to rehabilitation programs. If you have data that suggests some drugs just make rehabilitation impossible or unlikely, I'd be interested to see it, though.
It isn't that famously successful at all, at least in Portugal.
https://www.washingtonpost.com/world/2023/07/07/portugal-dru...