I don’t look to a government to define my morals. If you do, city, state, federal, you are in a world of hurt.
You are twisting it 180 degrees out. There are things that help a parent and things that work against parent. A parent is an authority figure. The state is an authority figure. I could be wrong but most parents do not want their kid smoking weed. So a good parent a says smoking pot is bad for you and a wrong thing to do. The state says it's ok pot is legal. Now we have two authority figures with contrary "rules". Not good.
The bible recorded a distinction between the broad morality of keeping civic order and more closely personal canons of morality, clear back with the covenant with Noah.
The usage of intoxicants would fall within the personal sphere. If, under the influence of same, people misbehaved within the public sphere, they would be liable in the public sphere for that misbehavior.
Without God’s plan to hang their hat on, people can only end up in endless control struggles.