Addiction is pretty much nothing more than the accumulation of toxic substances in the body.
Cigarette smokers are a perfect example.
There are over 1000 different toxic substances produced by the burning of the paper and tobacco, all very nasty.
A person isn't addicted to cigarettes till after smoking the first one, then the toxins are in the body which causes the craving for more. The more the accumulation, the stronger the craving.
Same with all drugs. All drugs are poison to the body.
No one can get addicted to something thats not a poison to the body.
Nobody has ever gotten addicted to celery.
Food makers add poisons (additives) to foods to make them addictive. People get addicted to that stuff and it keeps selling.
Once an addiction is no longer being fed the poisons that are causing it, the body slowly ceases to crave those substances.
Of course all the cravings never fully go away until all the toxic substances have been removed from the body, which can sometimes require a program very thorough to do this.
Cutting off the head of the addiction by no longer feeding it is always the starting point.
Quite often it needs to be gradual.
Leaning on some excuse that there must be an underlying imbalance of some kind is just looking for an easy way out and not facing up to the realities that exist.