“It is not for kings, O Lemuel, it is not for kings to drink wine; nor for princes strong drink:
Lest they drink, and forget the law, and pervert the judgment of any of the afflicted.”
This is for those people who are in charge. You could even say this applies to parents who oversee getting their children up to an age where they can take care of themselves. When you are responsible for others you must act like it and always stay in a state of readiness to correct and protect them.