It is not so much a matter of protecting people from their own stupidity as it is protecting ourselves from forces of mendacity. Government is the manifestation and application of force within a limited scope for the benefit of all who reside within that scope. That force serves as a curb on aberrant behavior. There would be far more robberies if the threat of authorized force were not a viable factor. Authorized force is demonstrable on a number of levels, and it is up to us to sort out the limits, methods, and means thereof. The very word “government” explicitly means restriction and discipline. How that concept can be lost in this place is difficult to fathom. This matter of MJ is better left to the States and local authorities.
Either or, just LEGALIZE IT!