People who are capable of moderating do moderate, usually long before they arrive at SR.
Clinging to the idea of moderation after repeated failures—or imagining how you can drink for a while longer, gradually cutting back, easing into abstinence—are hallmarks of active addiction.
Drinking feeds the addiction. The amount is irrelevant. In fact I'd submit that even the thought of one day drinking again—in a year, maybe two, maybe 10—feeds the addiction.