So then people should only have two drinks and be cut off?
BTW, you don't have to drink copious amounts to become an alcoholic. The consumption of copious amounts is one symptom, but it is not the standard.
You missed what I stated.
Unlike other drugs which get you addicted after only a few tries, alcohol is not physically addictive. So no, nobody would have to be cut off after X number of drinks. You have to drink large enough quantities consistently over a period of time before your body becomes addicted to it to the point that you've developed a physical dependency.
The body attempts to maintain homeostasis. Introduce a foreign chemical into your body and it adjusts to attempt to maintain homeostasis. Some foreign chemicals immediately bond to receptors in the brain and create an immediate physical dependency. For those chemicals that don't do this, such as alcohol, physical dependency requires a psychological addiction. Why? Because it is only through repetitive introduction of these chemicals that the body eventually recognizes the chemical as "normal" and attempts to maintain homeostasis
with that chemical, instead of trying to get rid of it.
Physically addictive drugs cause an immediate need for more. Psychologically addictive substances result in physical dependency and physical symptoms after the psychological addiction results in consistent use in substantial quantities. This is how people get psychological addictions to salt, caffeine and sugar. In regular amounts, these are acceptable portions of your daily diet. If you develop a psychological addiction to them, however, and consistently eat more than you should, your body's homeostasis is out of whack. Eventually, your body attempts to compensate by working that level of chemicals into your homeostasis, which results in a physical dependency that causes physical withdrawal symptoms if you attempt to quit.