If we kept opium dens there probably wouldn’t be widespread fentanyl use, isn’t it a reaction to the challenges of getting less dangerous opiates, i.e. is more

If we kept opium dens there probably wouldn’t be widespread fentanyl use, isn’t it a reaction to the challenges of getting less dangerous opiates, i.e. is more potent and easier to smuggle? Many places have “supervised consumption” sites or decriminalization now that has gone very poorly, I think in retrospect having opium dens for those who choose to live that way might have been a better alternative to the current state.