Yes, it started that way for him — after he became addicted there was little “choice” involved.
Which is part of the reason we have laws against the use of certain drugs (especially highly addictive drugs, and especially for recreational purposes) and against the people who, for profit, persuade others to engage in illegal acts of use.
If the drugs that killed him (as undoubtedly we will discover) were illegal, or he was using prescription drugs illegally acquired, then under the laws of the society we belong to (yes even you) someone besides him is likely culpable. And rightfully should be dealt with under the law.
Moreover, I am not a nanny state sycophant and do not want the government to tell me what I can put in my body if I wish.