Sounds good, but that's been tried for decades. Even with fentanyl and the risk of death, people still use. People will never, ever stop using drugs. It's never going to happen. Humans have always done it and always will.
And law enforcement doesn't work. As long as there's demand, there will be supply; arrest one dealer and another takes his place later that day.
And there will always, always be demand.
Drug prohibition makes no more sense and is no more successful than alcohol prohibition.