Booze isn't everywhere. A county near mine is a 'dry county'. My State has decided that counties could choose to sell alcohol or not. Some counties didn't want booze sold in that county. Ignoring my personal feeling about alcohol, States under the 10th Amendment have the police powers to decide what is sold and what is not.
Colorado decided to sell weed. Once again, they have the State powers under police powers to determine that for themselves.
Keep the feds out of it.
/johnny