> People should have the right to choose what to do with their bodies, and the legal system should have to ability to disincentivize antisocial behavior in ways that are productive i.e. that actually reduce it.

And this middle ground does that. You still can smoke weed if you want to and obtain it. But the government does not have any responsibility to facilitate you getting it.

Making the production, trafficking and sale illegal disincentivizes consumption without actually prosecuting the consumer.