Drunks eventually sober up as well, at least most of them. Like Otis on the old Andy Griffin Show, they can even hold down gainful employment. Also, it takes them hours, not days-- the reason it is illegal to sell booze on election day. Big difference from your average druggie zombie.
Millions of people perform theirr jobs everyday and enjoy some marijuana on their off time. It’s the same as alcohol in terms of impairment and ability of users to be otherwise functional.