You just can’t understand addiction unless you’ve lived through it. Hundreds of people die all the time from drug addiction, legal and otherwise. Even if you don’t die, addictions steal your life. You aren’t quite fully human when you are in the pit of addiction.
Just before you start in with the “But for the grace of God, there go I” line, think about it. Many people have addictions. They are just socially acceptable ones. You probably have an addiction and don’t even realize it. The best addictions just masquerade as habits. It is just something you do. You don’t know why you do it, you just do.
Gambling. drinking. Smoking cigarettes. Eating too much. Eating unhealthy food. Even being angry all the time can be an addiction.
Anything you do unthinkingly that is harmful to you is an addiction. It doesn’t matter if you don’t yet think it is a problem. If you let an addiction have its way, it will slowly take over until the addiction is driving you. It will use you like a puppet.