I also said, its the users fault they did the drugs, it's not their fault they became an addict. There's a huge difference. They became addicted because of poor choice they made to initially do the drugs, but after that, their brain changed. They did not voluntarily choose to be an addict.
This still makes no sense to me. I read it as equivalent to "it's the users fault they chose to play Russian Roulette, but it's not their fault their brains are splattered all over the wall". There's a direct causal relationship between one and the other.
Everything else in your comment I agree with, though