You say this like "oh it's just acts on a different kind of opiod receptor" means that it's not meaningfully different.

Your comment also seems to imply that this treatment involves consuming ibogaine habitually or regularly

The protocol for ibogaine treatment, according to the article and the experiments being done, do not have this requirement.

Like other treatments involving psychedelics and hallucinogens, the protocol here is that a one-off treatment, a single dose, results in meaningful improvements in both addictive behaviors and PTSD symptoms a month later and potentially longer

This is not the same as something like methadone or naltrexone, which _are_ what you describe: replacing a more harmful opiate with a less harmful one.

Actually it purges a small amount of brain cells deep in the center of the brain, that handles automatic movement. It also seeds a bunch of cofactors stimulating nerve growth factors and that area then regrows back with less of the addiction hardwired. It also helps to prop up the mood for a couple of months to give the person a chance to get going in another direction.