According to this scientist and community consensus - Drug Addition is a disease. The video shows how use of certain drugs has a physiological effect on the brain. The chemical changes and altered sensitivity in certain receptors causes the person to center their lives around acquiring more drugs to fulfill the greater dosage needed to satisfy them.
If all of the above is true and the classification as a "disease" is true - what does this say about the people who maintain the drug markets and the individuals who will to remove the legal sanctions against these drugs?
If there was a food item that had the same physiological negative impact upon the human body and the same addictive effects which derail a person's life how would society view the people who are responsible for pushing this substance upon people?