Read through the thread. Its been laid out quite clearly. Saying that the stigma is helpful is probably the worst possible thing you can say. It shows a callousness that is unbecoming of a Jew.
That is an emotional argument not a logical one. If it is helpful to some then it is callous to the those who would be helped by it if it is removed.
If this:
Plenty of people hold themselves back for various reasons including stigma.
Then that means it is helpful for those plenty of people and by removing it you would be taking someone who was doing pretty okay and destroying their life by removing what was the barrier to their becoming addicted. That is pretty callous to throw them under the bus.
Your refusal to see that does not mean that anyone who does feels there is no problem as you keep on doing. That is something purely in your imagination. I have never sadi such a thing or even hinted to it no matter how many times you make straw man arguements like this one.
Your refusal to admit that there is a problem without scientific evidence when the boots on the ground are telling you all you need to know is indeed telling. Keep your head in the sand. Keep finding excuses why you wont believe this or that fact on the ground.
I feel the most callous thing to do is to refuse to see this logical conclusion of what you yourself have said.
It is all a fine balance. If there are those who will be helped by removing the stigma then that is an argument to remove it. The issue is that as you agreed the stigma itself has a very positive side to it in that it prevents some from needing the help in the first place. If you remove the stigma it will help some who need it but also create more need for the help. This is all the logical conclusion of what you said.