Food addiction? how about oxygen addiction or water addiction...
do we need drugs or Alcohol to survive? no
do we need food ? YES
what you're asking makes no sense. There is no such thing as food addiction. People gain weight because of many reasons, it all depends on individual human physiology.
Food is a source of energy, some people need it more than others, which doesn’t mean they have to be overweight. I’m almost 6ft tall and weight 80kg. As far as I remember myself, I was always skinny but I do eat a lot. I eat everything, including junk food. I also eat a lot of fat and yet. I’m skinny. Two of my friends are overweight but I know as a fact they don’t eat much. It’s all about individual physiology. Weight can be related to some medical issues or many other things.