And even heroin as a drug causes less physical harm in principle than stated - proper administration primarily results in constipation and very rarely organ damage. The primary danger come from improper intravenous drug use along with variable concentrations of drug due to buying from a black market, resulting in accidental overdose.

Khat is a funny one - didn't we already go through the racial disparities in prosecuting "crack" and "cocaine" differently? It's too bad the African Khat-using community didn't muster as much political muscle as the kratom community is.