Well, that and nicotine and caffeine are the two most available drugs that do in fact cause physical dependance.

It's a dangerous rat hole to say well, I never got addicted to alcohol, drugs, smoking, therefore anyone that does must be weak willed and deserves whatever their addiction brings them. It's a form of social darwinism that lets us discount or completely ignore the plight of others not so fortunate. Similar logic applies when someone says I had no problem getting a job therefore anyone on the streets deserves to be there. The brain is not exactly a well understood organ and one person's indulgence is another person's demon.