Just watched "Symbiosis". This has got to be one of Picard's biggest blunders. The exchange he has at the end where he states that the Ornarans will go through a tough period of withdraw is just so wrong. Picard doesn't consider what a planet wide drug shortage will do to a civilization, especially one where every person is addicted to the drug.
So you are complaining, that Picard isnt making it easy to continue the supply of the drug, calling him inmoral, but you have not the slightest problem whatsoever wit the fact, that he doesnt tell the Ornarans about their drug addiction and it is in fact not a medicine they are taking?
It seems, you didnt get the point of this episode - or like Roddenberry would say (as Piller once quoted): What the story is all about.