Neuro-Diversity has parallels with physical disability. It's common the hear people say that their disability is not a problem, but the way society reacts is. (For example, someone in a wheelchair may not mind being in the wheelchair until they find a shop that has a step and no ramp. The wheelchair is not the problem; the lack of a ramp is.)

I would tend to agree with that.

I find it harder to agree that addiction is similar. I'm glad that the article points out the serious problems associated with addiction.

I strongly agree that current law-enforcement action for addiction is not working and is probably harmful to society.

The article has a bit of correlation / causation stuff going on. It's hard to know with an individual whether MH problems are being self-treated by drug use, or were caused by drug use, or a bit of both. And it's impossible to say for the population of drug users. When people with problems turn to drugs I think most people would rather solve the problems than allow drug use.