When I was in my early 20's a good friend of mine (mid 30's) was on the methadone program.
He functioned more or less fine all things considered, but used to get a little more than he needed and would trade the excess for weed with a guy who used occasionally.
They were only small amounts, and it was methadone rather than heroin so all of those caveats apply, but the situation seemed harmless enough to me at the time.
I remember that sometimes he'd be a little more out of it than normal, though, and it was when he'd have his supervised "usual" dose as a part of the program rather than the takeaway prescription.
Not sure why the weed dealer didn't get on the program himself, but I don't know what's involved -- maybe he really was one of the mythical recreational users, or maybe he was selling it on (seems unlikely in such small amounts, but that would depend on how many people he had that same arrangement with).
Then let's let those other cities, states or countries deal with this. Or do you deem those others so incapable that they require a nanny?
Give out only some milligrams of decent, even "organic" stuff per person, once every day - and the logistics will make it impossible to export any amount worth it, even at the todays prices.
No, that's unproductive. This approach will only lead to the black market staying black.
Drugs are recreational. By outlawing, or otherwise restricting drugs, a government admits to a decision to not provide environment and opportunities for recreation, or any other affordable opportunity for fullfillment.
By not removing those restrictions entirely, it admits it still desires the resulting oppression. So it's pointless.
Who they are going to resell them to?