What if eating is an addiction and starving is just a withdrawal symptom? is that how some people with eating disorder thinks?

Even more, I think: This sounds like a piece of disordered thinking. A person with an ed might also have other problems. Some intelligent people with thinking disorders can get tangled up in logic that includes a few true elements and leads to very wrong places. Some eating can be addictive, but not in general. Starving leads to death it is not a symptom. If this is you - see a psychiatrist for an evaluation. Best!