“What other religion offers confession as a sacrament?”
Who cares?
If it’s illegal to smoke marijuana, and the Rastafarians are the only ones who consider smoking marijuana to be a sacrament, then laws against smoking marijuana are not “targeting Rastafarians” just because no other religion decides to flout that particular law. That’s poor logic.
Despite peyote being illegal there’s an exception for the Native American Church to use it because they consider it a sacrament, ever hear of the American Indian Religious Freedom Act (AIRFA) of 1978?