Well I've kicked heroin but not nicotine. Not because the nicotine is more addictive, but because its harms are orders of magnitude less. I've tried both and I would rather go cold-turkey off nicotine than a strong opiate.

I agree 100% with the "perceived moral failings" part. Shaming people does not help. I couldn't kick the H until I stopped shaming myself. The guilt made my usage worse. It was caused by complex mental health issues, dealing with those got me healthy.

The whole ordeal has made me a much more understanding, compassionate person. I'm extremely grateful to be one of the few that made it out.