“Over four decades, American taxpayers have dished out $1 trillion on the drug war. What all that money has helped produce — aside from unchanged drug addiction rates — is the world’s highest incarceration rate.”
Regarding the “Law Enforcement Reasons”: The people who believe that have a vested interest. They are part of the prison-industrial complex. There are lots of very wealthy people who got that way on the backs of marijuana smokers, and they want to keep it that way.